Lordy Allsmiles, you've got the Klipsch bug bad!
22 speakers and you've never really tried any different electronics? The world is about to split open for you.
You haven't indicated your price range for components, so it is hard to make suggestions. Perhaps filling in the rest of your electronics will help, too. What type of cd player or dac do you have? What's your preamp? Also, how big is your room?
At a 101dB for the Cornwall II's and at least that or more for the Klipschorns, it won't take much to get them going. Though, I'd think those 15" woofers have got prefer a little power in the tank for big climaxes.
If you are used to the power reserves of the Carver M1.5T and like to crank it, it might be best for you to start out with a really good push-pull amp. Something with grunt.
Unfortunately, I'd suggest getting a new preamp at the same time or most the benefits of an amp upgrade would probably never shine through.
Let us know how much you'd like to spend on both an amp and preamp, and I'm sure we can give you a great list of potential buys.