If you are framing balls a lot, then you are probably not looking at the ball closely enough and the fact that you want to spin it a lot requires even more timing. I would try to hit the balls flatter and concentrate on the follow thru if I were you, at least until I get my timing down right and get a feel for hitting the sweetspot. Just my .02
In any case, as an answer to your question I would advice to get one of the light racquets, oversize heads and 16 x 19 string pattern. The light racquet enables you to swing it very fast, the oversize head helps reduce framing the ball, and the open string pattern helps with the spin. The prince bandit OS or the prince more control OS are 2 racquets that I have played with that I felt I could generate good topspin with.