Similar questions were posed here many times. I might give you first few info, although I'm not an expert (have that in mind).
First of all, those are highly praised speakers coming from an acknowledged constructor. Great choice.
I will only repeat what members here usually say, perhaps to save them some time. Many of them would say that even for loud listening (at least in small to medium rooms) receivers are usually just fine.
Bearing in mind you said you live in a condo (I suppose your listening room is not so big you'd need an overkill amp) and you will not be 'killing the speakers' any time soon, I suppose the advice is even more applicable.
First match, other than the obvious one; your preference, should be speakers sensitivity and receiver's power. Some members will point out that there are receivers that are 'short of breath' to be polite, when it comes to reference level listening. But if you can find one with sufficient power (and this is not too high), the rest should be OK.
Also, here, in Audioholics forums, members usually point out a plethora of options, connections, settings and so on, that usually come with the receiver making it difficult for most 2 channels amps to compete.
Separates may have some advantages, but improving low level listening is hardly one of them as low level listening requires even less power. The fact that it is separate (from the preamp I'm guessing), most probably will not affect the clarity at low levels.
