Consider price is relatively no object. Would you rather install an OCZ Colossus or 2 X25-E 64GB in a RAID using an Adata XPG EX92 SSD Hard Drive Enclosure? Keep in mind I'm more concerned with performance/speed than with drive capacity. I'm planning on making my 27" i7 iMac the best it can be. Once I chose a SSD option, I'll be purchasing a Panasonic UJ-235-A Slim Slot-Loading Blu-ray Combo Disc Drive. Also some 1333Mhz RAM to replace the stock 1066Mhz.