You may be right, how about dropping the Mac mini and getting the top end iMac then:
3.4GHz Quad-Core Intel Core i7
8GB 1333MHz DDR3 SDRAM - 2x4GB
1TB Serial ATA Drive
AMD Radeon HD 6970M 1GB GDDR5
Apple Magic Mouse
Apple Wireless Keyboard (English) & User's Guide
Promise Pegasus R6 6TB (6x1TB) RAID System
$3,898.00
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Two 2.4GHz Quad-Core Intel Xeon “Westmere” (8 cores)
6GB (6X1GB)
1TB 7200-rpm Serial ATA 3Gb/s hard drive
ATI Radeon HD 5770 1GB
One 18x SuperDrive
Apple Magic Mouse
Apple Keyboard with Numeric Keypad (English) & User's Guide
$3,499.00
and that's with out Thunderbolt Drive and monitor
I reckon the iMac would be a better bet
The beauty of a Mac Pro is that you can expand it and extend the life of the system, while the iMac / Mac Mini will be stuck with what you have. Not only that, but the cooling system is much more efficient on a Mac Pro.
That Thunderbolt RAID is going in the right direction, and it's good to see it being offered, but it doesn't quite level the playing field yet. Certainly it works for some, but when you need to grow, it means buying a whole new system instead of just expanding a Mac Pro.
I'm a good example of that. I started off with a 3.33GHz Mac Pro, 16GB of RAM, and two internal HDD volumes... OS and programs on a 640GB drive, and 3x1TB RAID for media. Clients needed Blu-ray discs burned, so I popped a BD-R burner into the second slot. Then I needed more space and backups, so I swapped the internal 3x1TB for 3x2TB, and used the old 1TB drives for backups with a Voyager Q dock. When that didn't cut it anymore, I built an 8-bay external RAID which has 12TB of space in parity and with a hot-spare. You can't do that with the Promise drive, yet. (Maybe they'll make an 8 or 12-bay model soon. That would be cool!) I'm finding my RAM is getting a little cramped, so I'm about to kick it up to 32 or 48GB. These little jumps in performance are much cheaper and easier on a Mac Pro, and in some cases impossible on other Mac systems. I don't have to worry about introducing dust behind my iMac monitor glass when I need to install something, either. I don't have to crank the air conditioning up and put on coats to keep my iMac cool inside.
Considering my system began life in 2009, and I'm still out-performing a current maxed out 2011 iMac / Promise RAID system, I'd say I'm doing pretty well! Growing from a 2009 iMac to where I am today would have meant buying new iMacs, and all those "savings" would have gone out the window.
