new comp suggestions plzFollow

Hello everybody. My 1st post. I am not all that tech savy and was wondering if I could get suggestions on what type of desktop I should purchase. What brand, specs etc. Will be used for gaming primarily and I would like to be as lag free as poss. For that matter any suggestions on which store bestbuy, compusa, circuit city etc. Im guessing $1k or so. Thanks in advance for any suggestions. Sorry if this is posted in wrong forum.