Best thing to do would be to try some of the major ones like MorphXT, Sivka etc. and see which one you like best. Go
here to browse them and see which ones have the features you want.
There's probably not that much difference between them, and everyone will just say to use the one they use anyway.
Just don't go for any of the leech mods or anything you need to pay for (although you probably knew that anyway).
And Xtreme is the highest rated on that site of course...