I used to drive a pair of Thiel 3.6's with a 2500A and it did a fine job. The dealer I bought it from also sold B&W speakers and used it to drive them (B&W) in his demo room. The 2500A is a very good amp for the money and has a very smooth and detailed sonic signiture. Sorry I can not comment on the Parasound. And if you go the cj route be sure it is an "A" model as it is much better than the non A.
Chuck
Chuck