Which processor from this group and why.

I am finally geting my first theatre setup together. Have a dedicated 35 foot by 25 foot basement for the room. There is a dedicated 220V/60A line into a Cinepro 120 sequencer and several Cinepro Pro Power 120's for the balanced power. Power amps for LCR are Crown PS-200's in mono (300W). The surround amp is a Crown PS-400 in stereo (190W/ch). All speakers are Klipsch. Corner horns for the mains and LaScala's for the center and surrounds. Subwoofer's are 2 Bag End 18". Its time to get the pre-amp/processor and get the sound system going and get the video going after that. There are 4 processors I am looking at, all in the same basic price/performance range. They are, Sunfire Theatre Grand 3....Anthem AVM20....Aragon stage one...B&K reference 50. I am looking for feedback from anyone who has used any of these pieces. Why you liked it and what you didnt like about it.