what amp under a grand?


I have vienna acoustic mozart grand marantz sr5005 avr,marantz 8001 sacd,vieanna theatro center,b&w 600s3 for rears,current amp adcom 555mk2.looked at used parasound hca 2003 thx, rotel rb 993, and and an adcom 5802.im fine with the performance the marantz gives me for ht but for two channel sound is muddy. i think its the amp? any advice on a used amp that would bring out the detail of the mozarts?
jughead
thanks for the advice.i think i might order the ghent dual mono and give them a try its 899 right now, and risk free where can i go wrong? plus its small! i do have a line on a rotel rb 1582 less than a year old for 800.
like all amps i hear good and bad about emotiva. but at 800 bucks i can get a 3 channel,330 watts into 4ohms and 260 into my 6 ohm theatro center.
bel canto 300m, rotel rb 1582, ghent dual mono, mccormack dna 225,adcom 5802,jolida 502p,emotiva xpa 3. whats the best match for my set up?