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
do you have room correction software you're running on your receiver ? if so, try turning it off. had the same problem and now much better with it off. on for surround
i will look into this,makes sense.thank you all for the input, have a lot of food for thought now.
Here are just a few integrateds with HT Bypass that come to mind...
Marantz PM8004, PM15S2, PM11S3.
Arcam A-28, A-38
Creek EVO 2, 5350 EVO, Destiny
Krell S-300i
Musical Fidelity M3i, M6i
Music Hall A70.2

There are probably a lot more than just the above list. Maybe some others can add to it. Another option is to consider a 2 channel pre-amp with HT Bypass and install it between your AVR and Adcom such as the new Parasound Halo P5. Same concept. Good luck to you.