GT240 is a new-age, entry level card. A friend of mine bought one for under £100 and can play most of the latest games on full settings. I personally have the GTX 260 (216)s, and think they're brill - being able to play almost every game I've tried on full settings at 1920. Completely depends on your budget though.
If you're not really looking to use it for heavy gaming, I would strongly suggest looking at the GT240.