I found some other parts over at the store, and they are physically in store too.
These:
http://www.datakjeden.no/tiller/PartDetail...57;c:36132;gr:0
http://www.datakjeden.no/tiller/PartDetail...19;c:36217;gr:0

Its a 450Watt PSU, seems very solid and it has protection against short-circuit. (And under-voltage, over-voltage)
These are both in store, but the price is a bit higher. (737 NOK higher.. )
But i can still afford it. (Got 2100 NOK)
I prefer buying in store, because then i avoid waiting for it.

But i have a question: can i use Nvidia cards?
The southbridge is ATI.

How about the 400CX instead? Most newer systems (even with SLI/XFire) don't REALLY need that much power and the 400CX is less expensive. http://www.datakjeden.no/tiller/PartDetail...51;c:36217;gr:0

It'll certainly power a 4770 and a normal system.

And yeah, that Asus HD4770 looks best. http://www.datakjeden.no/tiller/PartDetail...57;c:36132;gr:0

Unless the time element disallows it, I'd say order when it's less expensive. If it's $5 (in USD) or something small, I usually order online. Heck, the only time and money I spend in American electronics stores is to buy a cable or something. Last time it was my 3.5mm-to-RCA cable.

I doubt it will go lower in price.
The prices are "rock solid". (Almost never hcange, unless the card gets outdated)

And i will have to order that PSU though.

What power-cable does a memory-card reader use?
Floppy?