I'd second the Super Sportster. It was my second plane, first taildragger, and I learned a LOT with that plane. (Bought another one this year because I liked the first one so much.)

Leave the bipes for a third or fourth as recommended. There IS one biplane I'd say "maybe with an instructor", and that's the Super Sportster Bipe. It flys much like the Sportster with no bad ground handling traits, but it does need to be landed faster. Real problem is that it's been out of production for a long time, and finding one could be real difficult. (I still have one that's seen too much abuse. Thinking of trying to rebuild it this winter, but... )
Dennis-