which way to go in ht yet still have a good 2 ch

I am currently looking to buy a processor, but only want to spend about $1500-1800. A local Hi/Fi store is selling the B & K Ref 50 for about $1800. I have also been looking at used lexicon MC-1 and Classe SSp MK11. I like the REF 50 because it is new, however I want the better for my system. Has anyone tested these and what did they find works and sounds best? I have a Classe CAV 150 amp with Dynaudio A82's, 42's and C122.