Do yourself a favor and have a look at AudioReview.com . All of the positive and negative points of the 2200 are discussed.
http://www.audioreview.com/mfr/nad/amplifiers/2200/PRD_116004_1583crx.aspx
Be aware that the 2200 is a legendary amp, but they are 20 years old at this point, so you need to know how to deal with their weak spots. I posted a review about what to do if you have the "punch through" problem. Others have contributed alot of good info. on this amp. check it out.
That being said, I love mine and wouldn't switch.