I had the 2.5s in my system for a few weeks on demo. They are indeed very good speakers for the money and do many things well. But they of course have their limitations given their price, and I found them, not surprisingly, to be at the lowest lows and highest highs. The bottom is good for the price/size of the speakers, but they run out of steam quickly down there and as a result lack a bit of punch. Also, while nicely detailed up top they lacked the last bit of air that helps more clearly define recording venues and the like. Imaging, while very good, did not quite portray depth and scale that other speakers have achieved in my room.
All that said, I've not heard the PMC speakers you mention, but given the reviews I'd be very surprised if they don't sound significantly more accomplished in the above areas with your amp and in your room. As you probably know, they should be aimed straight ahead with no toe-in to achieve proper treble balance. I'd be very interested in what you find with an in-home demo. Other speakers I've heard that best the 2.5s in these areas are Joseph Audio, Reference 3A, and Silverline among others. Hope this helps and best of luck in your search.
All that said, I've not heard the PMC speakers you mention, but given the reviews I'd be very surprised if they don't sound significantly more accomplished in the above areas with your amp and in your room. As you probably know, they should be aimed straight ahead with no toe-in to achieve proper treble balance. I'd be very interested in what you find with an in-home demo. Other speakers I've heard that best the 2.5s in these areas are Joseph Audio, Reference 3A, and Silverline among others. Hope this helps and best of luck in your search.