If you have a tight budget, you can get a client PC for 16k or even lower. That's enuf to play the Good Games. Yung sakin 15,500 ang inabot per PC,hanap ka lang sa Gilmore. You can also get big discounts if you tell them that it's for icafe set-up and you'll buy more if the deal is good.
But if you want to settle for high end PC's, the one we call future proof, asus/msi,athlon,1gig memory,512 VC,15\" LCD monitor - with a price range of 25-30k ;)
Goodluck po and Welcome to ULOP!