Hello,
Some feedback, with additional ideas and options:
Conveniences of using Parallels:
-- When enabling all cores, I have found that CPU-intensive apps in Parallels work 95%+ as fast as real Windows on most types of stuff.
-- Mac power management seems to works better if you run Windows in Parallels rather than Boot Camp.
-- You can multitask using the Mac for other things while Windows runs in the background. You can thus do other productive things.
-- The bonus is that you have convenient backups of virtual hard disks as individual files, so you can "reinstall Windows" or "rollback Windows" in seconds or minutes (an advantage of choosing virtualization). It is easy to back up, because backing up a virtualized Windows hard disk is as easy as backing up a single large file.
-- You can very easily copy virtual hard disks (as files) between Mac's, so you've essentially transferred your copy of Windows -- and all its apps, users, desktop, files and settings -- just simply by copying one big file.
-- If you are a person who has to reinstall Windows occasionally or go to clean installation of Windows on occasion, the time saved with virtualization can be worth it.
-- You can download a free trial of Parallels, and install your old copy of Windows, do a test, and see if it runs fast enough -- before paying for it.
-- You can download a free trial of Windows 7 (legal!) to install in your free trial of Parallels. Zero dollars for testing before you decide you want to buy....
-- You can migrate your Windows partition between Parallels and Boot Camp in the future, or run the same Windows partition in both (switching between performance versus ability to multitask with Mac apps)
Some notes:
-- Does your data analysis requires hours of CPU everyday? If not, then keeping your Mac may be best. Even if it takes 15 minutes longer per day, you're saving money, and you get to keep multitasking.
-- Consider running your processing job overnight
-- Your data analysis might even be disk-bound. If so, then buying a new laptop may NOT help very much unless you make an SSD upgrade (if transaction bound) or RAID upgrade (if throughput bound). That will require you to spend more than $1200 for a laptop. Might as well keep the Mac. If your Mac has a thunderbolt port, you can later upgrade to an external enclosure.
-- The only situation where it really makes sense to switch to Windows is if the data analysis will require tieing up your computer for hours everyday, and you really need a 4-core or 6-core CPU.
-- Does your processing software support multi-core CPU? If it's old processing software, then multiple cores don't matter much.
-- Boot Camp: If you're plugged in during the times you plan to run analyses, who cares about power management? (except for saving a few pennies a year off your electric bill, of course -- even without good power management, laptops already are far more efficient than desktops.)
-- [If you have LOTS of processing to do, and faster processing easily means more money.] Alternatively, you need cheap CPU processing/rendering/etc for grunt work, you could perhaps get a cheap Windows tower PC with a fast 4-core or a budget 6-core CPU. You can process data several times faster than a laptop for only a few hundred dollars (budget motherboard with integrated graphics, good CPU, NO need for expensive graphics card (GPU) and NO need for expensive big power supply unless your statistics software uses GPGPU/CUDA/etc for GPU processing). Don't buy a computer monitor. Use your HDTV as your computer monitor temporarily until you've got Remote Desktop, then relegate the computer to a corner to do data processing while you enjoy your Mac and using your Windows computer via Remote Desktop or VNC. Presto, solution for LESS than $500 WHOLE computer, Windows pre-installed, including at least 4 cores. Newegg sells AMD 6-core CPU's between $139 to $169. So for just a few hundred, you could pull off a statistic crunching desktop tower that processes data MORE than three times as fast as your Mac, without needing to sell your Mac! Just Remote Desktop -- Microsoft has Remote Desktop for Mac available! This might potentially be similiar to the difference between selling your mac and buying a Dell (including taxes, shipping, and respective extended warranty). And still runs CPU-based stuff much faster. Obviously, that's if you need to run enough processing that overnight runs are required.
-- now, despite the problems and complaints, I should note that even Boot Camp on a Mac is still a better experience than many cheap Windows laptops. Even the better Dell ones. (can test with free trial of Windows 7) Your consideration may be processing speed, and only if your processing software is the type that ties up a computer for hours everyday consistently.