Which speaker is best for my Krell amp?

Pair of used Wilson Watt 3 Puppy 2 will be really great and could be the last speakers you need to buy. They sell used about $4200 in excellent condition. Also, consider the Von Schweikert VR-4 for about $1500 used, which could fit your "best bang for buck" request.

I must disagree with the statements above about the B&W's. First, the B&W's are the most expensive speakers on your list. I've owned 802N's and currently own 805N's. In my experience with B&W's, they require good upstream electronics, a lot of power (which you have), and exact placement. I was just shopping around for a new pair of speakers (I got the bug) and listened to about a dozen different different brands and when the dust settled I ordered a pair of 805N signitures. My regular 805N's will be up for sale shortly.

P.s - Last night I had some relatives over and we were watching CSI on the H/T rig in stereo. My brother-inlaw leaned over during a commercial and said "This is in surround sound, I can here things coming from behind me". I smiling and repleid "No, it's called imaging and sounstage", and then I gave him the short lecture on imaging.

The PSB Stratus Gold i's are perfect for your Krell. You can find them used in pristine shape for around 1200.00 It will cost you at least 100.00 to ship though.

Does it mean the PSB Goldi is better than the NHT 3.3? Krell is bright but I think the Sunfire pre-amp will compensate that. Will the NHT still sound bright in my set up?