I wouldnt dream of buying an oem computer these days.
Newegg.com is your best friend.

A budget build I did recently that handles poser pro with no problems.

apevia x-plorer case and 420w power supply $79
intel celeron e1400 dual core @ 2.0 ghz 800 fsb $49
foxconn g31mxp-k motherboard $44
2 gig dual channel kingston hyper x memory @ 5 5 5 15 800 mhz $32
galaxy geforce 8400 gs 256mb turbo cache to 512mb $35
liteon cd/dvd $30
western digital 80 gig sata hd $35
total is $304

this motherboard does allow some overclocking features.
it will bring the e1400 from 2000mhz to 2650mhz stable.
the memory I have overclocked as well with 5 5 5 18 timings @ 1066

for the adventerous you can do a pin mod on the cpu as I've done.
same setup as above with the cpu running at 3400mhz and a fsb of 1360

The greatest thing about going this route is that it is upgradeable without the headache of
sticking with what will work for hp, dell, gateway, etc.

Handle every stressful situation like a dog.

If you can't eat it or play with it,

just pee on it and walk away. :-)

....................................................

I wouldnt have to manage my anger

if people would manage their stupidity......