New rig

im back after a long trip and planning on building a new computer. i have purchased all the parts already and since this is my first time building a PC i was wondering if there is anything that i should look out for?

i got the new cosmos 1100 tower

ASUS M3A32-MVP Deluxe/WiFi mobo
AMD Phenom 9600 cpu
CORSAIR XMS2 2GB (2x1GB) 240 pin DDR2-1066 RAM
SEAGATE Barracuda 7200RPM HDD
HIS Radeon HD 3870 512MB 256Bit GDDR4 PCIE2.0 x16 GPU (two of those)
XION Supernova 800W PSU

and a CPU coller, GPU H2O cooler, thermal paste. i have a DVD/CD rom laying around somewhere in the apartment.

all in all it came out to about 1500$

any advise, comment, criticism are wellcome

Static electricity. Touch an unpainted part of your computer's case before you begin and don't stand on a carpet.

yup i already read a lot about ESD.
thank you

Some sort of OS?

Please keep us updated with how you get on, I have the same MOBO, and the CPU below yours. I'm currently having a few issues getting going if you have read my post

i havent read your post, but i would love to though, do you think you can post a link?

and i am thinking about XP, because that is the only thing i have right now. but definetily upgrade to vista 64bit later down the line

never mind i found the post "installing XP on new build"