Dali Helicon 800 mk2 or Euphonia MS5

Cables I've liked with the Dalis (and this can mean both speaker cables and ICs):

Harmonic Tech
Synergistic Research
Analysis Plus

I think the cheapest thing to do is play around with different cables. I'm not familiar with Kimber, besides from reviews, so that may be something to do. The Dali's are extremely revealing and transparent speakers. I don't think they like silver cable because of the tweeter configuration, but others may disagree. If you're finding the sound warm then silver may not be a bad thing here, though, so maybe that's something to keep in mind. I think and easiest thing to do is to change your speaker cable. Do some research and buy something you can easily resell and then your exposure is minimal.

I have the MS5's along with a Velodyne subwoofer. Amp is a McIntosh MC 7300 and a Mcintosh preamp C36, Nordost speaker cables, interconnects. I find the MS5's to be more revealing of source components than cables and they like power and a large room. If they are within your budget then you won't be disappointed.

Many feel that a high power amp (400+ wpc) will provide better control of bass which might decrease the warmth you're hearing.

If that idea doesn't appeal to you, you may be better off trying a different speaker manufacturer. It is my understanding that the Dalis all have a family resemblence soundwise.