Sony STR-DG720 paired with Klipsch Quintet II. Any issues?

[azereus]

The title pretty much sums up my question here.

I've got a Sony STR-DG720 receiver and i'm looking for some small bookshelf speakers. I can get the Klipsch Quintet II for about $250. Was originally looking at the Quintet III but it's at least an extra $200.

So original question, any potential issues with this setup? the receiver lists 100W per channel, while the speakers list 50W continuous and 100W peak. Any issues with that?

Second question, is there that much of a performance increase between Quintet II and III to warrant the extra cost?

Thanks.