27-inch iMac with Retina 5K display: • 4.0GHz quad-core Intel Core i7, Turbo Boost up to 4.2GHz • 16GB 1867MHz DDR3 SDRAM - two 8GB • 512GB Flash Storage • AMD Radeon R9 M390 with 2GB video memory Mac Pro: • 3.7GHz Quad-core Intel Xeon E5 Processor • 12GB Memory, Dual AMD FirePro D300 GPUs • 256GB PCIe-based Flash Storage Hi, This new iMac is $2,800, the Mac Pro $3000. Very close in price due to the upgrades in the iMac I'm contemplating. I'm a singer/songwriter. I'll record with one or two mics. Audio interface is Apollo Twin Duo via Thunderbolt. I have two displays I can use for the Mac Pro, so the lack of a display with Mac Pro is a non-issue. I'll have two 23" Apple HD Cinema Displays going. Would I need an external hard drive with the iMac? Would I need an external hard drive with the Mac Pro? What would your ideal set up be if I installed Omnisphere? It takes 60 GB. Should I consider a Fusion drive in the iMac? I've read a lot of threads and there seems to be conflicting information. If possible, in your response, consider that I am on the hobbyist/enthusiast level, but I have already produced three albums. In other words, this is not for a for-profit situation where I do this for a living. In my last incarnation as a music producer, I had a 2008 Mac Pro. I had 3 spinning disc hard drives. Flash drives were too expensive back then to even consider. So I'm wondering if I'd be better of future proofing myself by getting the Mac Pro where I can expand it at any point in the future. That being said, the iMac I'm considering is top of the line, quad-core i7. The iMac could be upgraded to 32 GB of RAM, whereas the Mac Pro could go up to 64 GB of RAM. The thing is, at this price point, I'm already pushing the budget, but for what it's worth, maybe the Mac Pro is the way to go for an extra $300 (Apple Care is $100 more for the Mac Pro). If I go with the Mac Pro, I am only getting a 256 GB PCIe-based Flash storage instead of 512 GB with the iMac. Is the size of the SSD more a big deal and should I therefore go with the iMac? Are there any hidden costs I'm not considering, such as if I go with the Mac Pro with the 256 GB PCIe-based Flash storage, do I need another internal/external hard drive for my sample library? If that's going to cost another $300-400 then I'm pushing the Mac Pro cost up towards $4k, which is way over budget. I'm only running Logic Pro X right now. I did use Omnisphere (version 1) in the past and loved it. I sold my license several years ago but I am now thinking of buying Omnisphere 2. Would it be advisable, with the iMac, to put everything, including the Omnisphere library, on the 512 PCIe-based Flash storage? If that's true, the iMac situation would be cheaper because I would not need an external hard drive. In either scenario would it be advisable to I use my six-year old 1TB Glyph external HD (GT050Q) (USB 2.0), or would that slow everything down? How about storing projects on Dropbox? Do you turn off the uploading feature during sessions? Is the Mac Pro going to be phased out? Is the Mac Pro late 2013 model kind of out of date at this point considering the iMac is a late 2015 model?