donaldekelly,

what I've read around here most would agree the VP100 is a very capable centre. I have heard many times before people say that the VP100 sounds the same as the VP150 and so should match the M22 similarily. The advantage of the VP150 is it has better dispersion and obviously plays louder. I think any difference noticed between the two would be due to these two things. So if you're in a smallish room the VP100 should be ample and beable to match the M22 just as well as the VP150. If you're in a larger room then the VP150 would probably work out the best. If you can afford it and in doubt go for the VP150.
No remorse...

Anything else to consider for a centre? It has been mentioned before and I'm a fan of the idea of using an upright centre like a single M22. I bet that would match perfectly

Cheers, Jag