Amplifier to complete a 7.1 channel system w/great stereo music performance?

I currently have a 5.1 channel system in my home theater media room using a Rotel RMB-1095 amplifier, which is a 5-channel amp w/200 watts per channel.  I have a Rotel RSP-1069 surround sound processor.  I want to complete a 7.1 channel system and want to add a nice 2-channel amp to my system.  I want to not only achieve a nice 7.1 channel home theater system for movies but I also like to listen to stereo music (mostly rock & roll music).  I would use the 2-channel amp for my front main LR speakers.  My two main front LR speakers are psb platinum T6.  My center channel is also a psb platinum series.  My main concern with this purchase of a 2-channel amp is with an emphasis on great stereo music first with home theater movies secondary using just the front LR speakers.  My Rotel 5-channel amp will power the center channel, LR side surrounds & LR rear surrounds.

With a $2,000 budget I have three 2-channel stereo amps I'm considering as follows:

1.  a used Krell KAV-2250 with probably no more than a 30 to 90-day warranty around $1,750
2.  a new Parasound A-21 Halo that I can get brand new for $1,995
3. or the brand new ADCOM GFA-575se model which can be purchased new for about $2,200

I'd like any thoughts, opinions or suggestions from any of you audiophiles on these amps or any other amps in the $2,000 range that you feel will give me great home theater sound on movies and improved stereo sound with music.  Particularly comments on comparisons or experiences anyone has had with any of these amps or others that you think might fit the bill.  Thanks!