I'm thinking of upgrading to either a 20" or 24" widescreen display so need a card that is capable of running games in 1680 or higher at good framerates. I don't really want to spend more than 200 quid. From reading some threads here either 7900GT or X1800XT would be good candidates. What are these cards like for heat and noise as I would like it to be quiet too or is that too much to ask?