which centre speaker?

Time for an upgrade.

I'm using a MA silver centre that I got off ebay to test out the surround sound concept. The rest of the system is an odd assembly of Reiver Edingdales and Dali wall mounted rears. I'm looking at the Dali Opticon Vokal (£460) vs Martin Logan Motion M30 (normally £690 but as it's an older model they are selling them off for £350). Any thoughts or recommendations?

I had the MA Silver6 2.5 way floor speakers and they are an amazing speaker for the bargain price. They just sound musical and clear, with a deep tight tuneful bass. Have you considered adding these to your existing center so the front three speakers are timbre matched, instead of finding a center to match your existing L/R speakers.