I have to agree with most of the responses here. The Krell should be replaced. Naim has great synergy with Dyn's. But since you are asking what speaker would give you more warmth I would second the Sonus Faber followed by Vienna Acoustics.
If you can't get an in home demo see if you can take the Krell to some dealers. Mind you the room and setup will greatly influence the sound.
If you can't get an in home demo see if you can take the Krell to some dealers. Mind you the room and setup will greatly influence the sound.