I wish I knew lol. Need it for regular everyday home use...
So check this one out and play around w/ the #s but that build puts you right under $500 (most bang for your buck). Intel processors are the fastest and a SSD drive is nice (though you can always put one in later and prices on them are falling).
@Yisroel Tech can, or not, give his haskamah on this as our resident IT chacham...but we just bought it last week so I'm hoping he says it's at least ok.
If your budget is lower or higher let us know.