Tom, from what I know of your Classe gear it is on the forgiving/musical side. Krell is more transparent and revealing. I've heard the Vienna Acoustic Beethovens in a store and the VA Haydns in my house, and in both cases they were smooth, musical and warm. It doesn't surprise me the VAs really sang on the Krell amps but sounded muffled when matched with the Classe amps. Therefore, you could probably take greater risk than some people in coupling your Classe amps to more revealing speakers. Conversely, the Krells might benefit from being matched to less-revealing speakers.
People have posted in the forums here that the new Sonus Faber HOME speakers are warmer and fuller sounding than the previous models. It'll probably be tough to find a place to audition the older models since the HOME line has been out for awhile. But many forum members seem to think the newer models are better. So it looks like by purchasing the Grand Piano HOME you'll have an improved model and will also be able to save some cash by only having to use a single pair run of speaker cable, since the new models can't be biwired.
While the Sonus Fabers are good in my system, they were definitely bettered by the ProAcs. However, it seems the Grand Piano HOMEs might be AT home in your system. Good deal, because this way you'll save a ton of cash, and will have a system you really enjoy. This is what it's all about isn't it? Let us know what happens Tom!