I would like to play the sims 3 on max settings smoothly. I will be using plenty of custom content as well as 3 or 4 expansions.
These are the minimum requirements http://www.thesims3.com/game/systemreq
What's your budget? Perhaps I could find something better in the range. The dell will never be worth it. You're going to have to upgrade too much to make it worth it. Is the sims 3 all you will be playing?