Hey. I'm going to repeat that this:
http://www.overclockers.co.uk/showproduct.php?prodid=CA-007-PP is the psu you want.
Corsair, be quiet, zalman etc are very good. Seasonic and pc power and cooling are the best. I'm using one of the 860W models now. Justification for this psu over the alternatives.
On the face of it, 7 year warranty and 200,000 mtbf are exceptional. That you can adjust the 12, 5, 3.3V rails yourself if you don't feel they're close enough to spec, using a multimeter and a screwdriver, is unbelievable. Next, it comes with a complete testing report done by hand prior to packaging, so the chances of it being dead on arrival are zero. Build quality is needless to say exceptional, I took one apart a few days ago and it's beautiful inside. For cooling they've chosen a (very) undervolted 3 blade 5000rpm delta. Delta make fantastic fans, known for being astonishingly loud. Nonetheless the psu is very quiet, and I'm becoming obsessive about how much noise my computer makes.
The vertex is a lot faster than the corsairs, as the price reflects. The g skill falcon 64gb and the vertex 60gb are almost identical, but the aftersales support of ocz wins it for me.
As for partitions, the most common way of doing the raid is at a level equivalent to the bios. The operating system is none the wiser, three 30gb drives in raid 0 will look exactly like a 90gb drive to the operating system. So yeah, partition it however you please. You'll need raid drivers to install windows onto it, but thats true whether partitioned or not.
p.s. there are a couple of people with the corsair ssds who seem to like them, but I'd not even look at one over a vertex. I'd rather a 30gb vertex to a 256gb corsair. The 30gb ocz is what other companies would call 32gb, they both format to 29.6gb or so.