RE: Pitts or Skybolt
If you're afraid of the dreaded "Dumb Thumb" syndrome, go with the Skybolt.
Both are very aerobatic, but a Pitts is much less stable. One wrong move with a Pitts could be... Well, the Pits!
The GP Skybolt is a very stable airframe. I have had the Kit and I reviewed the ARF for RCU Magazine last spring and I love them both. They are very stable, like a pattern ship, with no bad habits.
If you haven't seen it yet, here's the review:
[link=http://www.rcuniverse.com/magazine/article_display.cfm?article_id=750]Super Skybolt[/link]