I had the exact same problem, I had to choose between the PW-2100 and PW-2200, I went with the PW-2100 the following two reasons were what finally made my decision for me;
- 10" Woofer I felt would be a little faster for Music (60% Music/40% HT)
- The PW-2100 was about $200.00 Less
Was it the right decision ? I have no Idea, however I can say the PW-2100 Sounds awesome so I assume the PW-2200 would as well, If I had the money I'd probably have gotten the PW-2200 however I needed the Cash for a better AMP and Receiver so I cut costs with the PW-2100 and I purchased the Monitor 7's as rear surrounds, they were cheaper than a Pair of ADP-370's with Stands
My Set-up now is as follows:
2 x Paradigm Monitor 11's Mains
2 x Paradigm Monitor 7's Surrounds
1 x Paradigm CC-370 Center
1 x Paradigm PW-2100 Sub
For me I feel the trade off's were well worth it, one day I may even add a second PW-2100, that will more than make up for one PW-2200