...or are you just setting a top price and want to get the best system you can?
if the former, and your game play is restricted to golf games, you could do better. Are there any computer fairs nearby? Go there and ask questions of the traders. The are all keen to help and you will find you get more per quid. If the latter, look at diodorus's link. Remember, you will not need a graphics intensive machine, if you've been honest with yourself about the uses.