I currently have a late 2008 MacBook with 2.0 GHz Core 2 Duo, 4 Gigs of RAM, 5400 RPM hard drive. I work in OSX 65-70% of time and Windows 7 64bit the rest. I use Parallels 5 to do this. I prefer Parallels over Bootcamp for ease of back up of my Win 7, to copy/paste between the two, and various other reasons. However by using Windows 7 like this, it really bogs down my Macbook and can be a pain many times, very annoying. I put an SSD in my Macbook and noticed a huge boost to speed and ability to run my Win 7 VM. All slow down went away. The bad part is that after a month or two of this the SSD would freak out to the point I couldn't boot the Mac at all, something in the SSD would corrupt. So I would have to wipe it out and reinstall everything (OSX and all) from Time Machine. This "cycle" would repeat every month or two. So a SSD is not a solution, the VM messes it up. My question to you all is would getting the 15" Quad core Macbook Pro allow me to see better performance when I have my Win 7 VM running. I could then assign 2 of the 4 cores to Win 7 and up the total RAM to 4 gigs for Mac and 4 gigs for Win 7 (8 gig total in the computer). My current Macbook is maxed out with 4 gigs RAM (my model can't go to 8) so I can only have 2 gigs each. With 64 bit Win 7 it really should have 4 gigs. Anyone have any experience with running Win 7 in Parallels on the older and newest models? Will I see "boggyness" go away or will the fact that it still uses the same hard drive mean no dice and it will perform the same as with my current Macbook?