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You want the article Generic Guideline for Disk Setup
I wish my PC had Thunderbolt but I'll have to wait for that. I wanted to get a nice external storage device but wanted to wait until TB is available for PC. USB 3.0 is nice but I can wait it out for now.
If anyone thinks I should maybe - add another disk here or there - I'd love to hear back from you.
From the sound of your statement above it sounds like this is too late but Gigabyte just announced two new z77 based motherboards with two Thunderbolt fully certified interfaces on each motherboard.
SSD boot, great
Suggest you configure 2x 3TB RAID 0 arrays; 1 for projects, scratch, media, 1 for exports, media cach, media cach db, windows swap. That will give you lots of speed for most media include SD and HD formats.
Then, get a caddyless hot-swap bay for your pc to house the other 2 physical drives for backups, etc.
You are running RAID 0 so having two drives for backups works pretty well - one in the pc at all times and one off-site that you backup to say once/month.