Sounds like you're already setting the groundwork nicely. Again, I'm not an expert, but I think the TT figure is irrelevant - relevant experience is more critical. I spent 45hrs touring the aussie bush in a C172, that added nothing to my ability to fly a pitts!
Obviously there's the CS prop to play with, and it moves much faster in the circuit than you're used to, but it's not rocket science. The main thing I'd throw out that nobody mentions is it really matters who your instructor is, and that can be quite personal:
Some are too keen to tell you how impossible everything is, often they won't let you fly enough to make a horlicks of it (perhaps they aren't confident enough in the aeroplane themselves). Some are too laid back and don't really teach. Some set you on edge, and you can't perform alongside them, no matter how great an instructor they are. Some are none of the above and absolutely brilliant - just to be clear I'm not 'having a pop' at the instructor profession - It's got to be a very tough gig to teach something like that, and my 'horror' might be your ideal.. but it does make a huge difference..