The worst thing about the C150 Aerobat is the name - It's about as aerobatic as I am athletic.
Yep - the one nice thing about aeros in a Cessna is that, when you then aero another aircraft, almost ANYTHING is great after the C152!
Think the main alternatives have been pointed out, Bulldog is great but a bit expensive, Pup is good if you can find a nice 150, Slingsby - well just read the other posts, Robin is probably about your best bet. You then get into the more serious Aerobatic machines.
If you were not after one to hire out then the RVs are great for groups, but of course not able to be used for normal club work.