Default AT&T Smart Phone Without Data Recommendations?

At the moment I've been using a Droid 3 on ATT to avoid attaching a $30 a month data plan. I like the notion of getting $10 a month unlimited data, but haven't done so yet. I got the droid for super cheap and, although it's kind of a nice phone, would be interested in a better phone running a more modern version of android (4.0+ on a droid 3 breaks the camera) that doesn't require data on ATT. Does anybody have any suggestions? My price range is around $200 since I could probably get $100 for the D3 unlocked.
I've looked at phones like the S2-T989 (which I THINK isn't registered to ATTs network), but I just want a more responsive phone with at least a gig of ram.