I love Dynaudio, and have the Contours (3.0) for my dual-purpose system, and heartily recommend them. However, they really like to be driven, so you need fairly beefy amplification to get the best out of them. The 2.5's may be somewhat easier to drive than the 3.0's, but you'll want a minimum of 100 hefty watts (ie, doubling into 4 ohms and again into 2 ohms).
I've never used Monitor speakers, but they certainly have a great reputation. They quite possibly would be a better choice of a HT-only system if they're easier to drive, not to mention if they're somewhat cheaper.
I've never used Monitor speakers, but they certainly have a great reputation. They quite possibly would be a better choice of a HT-only system if they're easier to drive, not to mention if they're somewhat cheaper.