also i would say depending on his needs is how he should decide.

antec sonata II with its smartpower 450watt would work well with his "original" setup but if he goes with a 8800 he will ned something more powerful.

Basically advice to the guy building is.

get a cheaper vid card if you have to, get some cheaper ram, get a cheap case, get a 6400 processor if you ave to but where u dont ever wanna cheap out is on your motherboard and power supply. Doesnt mean u have to buy a 300$ motherboard or a 500$ power supply. just means get something of a quality build