So I'm planning to upgrade (crossgrade?) from 1,1 Mac Pro to the entry 27" iMac. I'm selling the Mac Pro without my 80GB Intel SSD. I'm not really up for paying $600 for the SSD addition (although, by Apple BTO standards, 25% above market price is reasonable) as it's just beyond my budget. I'm going between trying to bracket mount (after finding a bracket..??) the 2.5" internally on my own, putting it into the optical bay (as I've done on my uMBP) or thinking to maybe try to boot from a FW800 enclosure? I'd use a TB enclosure if they were out - does this make any sense, performance-wise? I have the SSD for OS app snappiness, don't actually 'need' it but have grown accustomed to it, hard to go back to HDD for OS/Apps.