Something else I thought about is that, if you're set on the Krell integrated and just want speakers that aren't as polite as the Polks, why don't you check out the Von Schweikert VR-1 stand mounted monitors(or the VR-2 if you want to try floorstanders). I've never heard them extensively(as I have the Polks) and somehow they weren't my personal favorite but they are very impressive. Fast, tight, and can fill a room with music. They were just slightly upfront for my taste. Although I have to admit I haven't heard them in my new listening room(I bought a house about a year ago) so even then my opinion could change.
Other speakers that I've heard and like that maybe you could try are the Gershman Acoustics RX-20 Avant Garde, the Dynaudio S1.4, the Dynaudio Special 25(if they are in your budget), and well you know I'm quite fond on the LSi15s.
Other speakers that I've heard and like that maybe you could try are the Gershman Acoustics RX-20 Avant Garde, the Dynaudio S1.4, the Dynaudio Special 25(if they are in your budget), and well you know I'm quite fond on the LSi15s.