After some research i decided to go for the gigabyte ud3p - Seems like a tight tie between ud3p and asus p5q pro performance-wise, so the cooling and the extra usb ports made the decision for me. I decided to keep the chill innovation psu, even though the specs slightly favoured corsair hx520. This is a gut decision, as im quite sure the chill will do the job. It feels good to support the single hardware manufacturer I know of in Denmark, so I hope this decision won't come back to haunt me

The build as of now looks like this:
gfx: ASUS EAH4850/HTDI (512 MB)
cpu: Pentium Dual Core E5200 2 MB
mobo: Gigabyte GA-EP45-UD3P
ram: OCZ Enhanced Latency 2 x 2 GB
psu: Chill CP-520A4M
hdd: WD Caviar Green WD10EACS 1 TB
case: Antec Three Hundred
I would like to thank everybody who so far have helped me with my build

It has been a long time since i've seen such willingness to help in the online communities i frequent.
Having said that i have one more question - should I buy some better ram? The ones currently chosen are "OCZ Enhanced Latency Gold Gamer eXtreme XTC Edition Dual Channel" with these specs:
2 x 2 GB (4 GB)
PC2-6400CL5
800 MHz
I did some research but the wealth of choices quickly got me confused. The only thing i'm sure of is that i want to have 4gb of dual channel ram in the build.