Euclid,
Knowing the 28% W/H planes as I do, I don't think you will have any troubles at all. It never hurts to have someone around that already flys medium sized aerobats well.
The flip side of the ability issue is that the 28% planes will provide all the help you can ask for in improving your ability. They are pretty stable flight platforms at standard rate settings, and have the flexibility to "do it all" at higher control travel settings as your comfort and ability increases.
Personally, I think you made an excellent choice. Enjoy
Pat