I am ordering tommorow  
 
Q6600
8800GTS or a 2900XT
havent decided which mobo yet,probably one with a I35 chipset
Crucial Ballistix 2gb 800mhz 4 4 4 12
Thermaltake Armor LCS (with watercooling)
2 HDDS
2 DVD/DVD RW
 
How many watts do you think I need for all these?Can you recommend any good PSU's?

FSP, OCZ, Antec, etc. You will probably want to spend about $100 or so on the PSU (which should get a decent one from the previous stated manufacturers). I see your going to OC (I hope)? I would get the 8800gts 640mb version or the 2900xt. I don't have either <sobs>, but either would do fine. Buy the cheapest one of the 2.

Starman,
 
Go here http://www.extreme.outervision.com [...] orlite.jsp and figure out how big a PSU you will need... don't just guess at it

i would just go for a decent 5-600W PSU, won't need anymore than that, always leave some headroom.

VERY happy with ThermalTake stuff, as strangestr says, get a 5-600W unless you know exactly what you plan to do, and ALWAYS CHECK THE AMPS ON THE 12V RAILS, MORE IS BETTER.

I think im going for the Corsair 620,ive heard some good things about it.What do you think?

slightly overkill but will last you a good few years.