It sounds like you have that B&K Reference 30 (which is a HT preamp/processor) AND a separate amplifier. Based on your tendancy towards "warmer" sounding equipment, I would look at the Bryston SP3 HT preamp/processor to replace your Reference 30. There aren't any up for sale now, but I think I have seen them in the $3-4k range. The Bryston SP3 has excellent power supply and fully discrete Class A analog audio stages. However, for my own HT tastes, I found it too laid back in the midrange.
I would actually completely disagree with millercarbon's opinion that "HT is just a wasteland of bad audio" and "you will find there are no multi-channel anything that sound good".
I would actually completely disagree with millercarbon's opinion that "HT is just a wasteland of bad audio" and "you will find there are no multi-channel anything that sound good".