Would like to try a really accomplished class A someday but don't want to deal with heat. Same with tubes I suppose. Purportedly, some class D can sound very class A like and that could be the best option.
But if space suffers, instrument sep. and stage depth isn't there, I wouldn't like it overall regardless if how smooth it sounded.
If you have 10 watts of class A, it should perform well at both low to moderate SPLs including dynamic swings. The occasion peaks into class AB, etc probably wouldn't be audible until you turn it up to louder levels and at that point, its hard to listen too for longer periods of time and without risk to hearing.