Both the Proac and M22 has great detail. The Proac is a little less forward. Both still need a sub for lower registry. The Proac is a mini monitor as has fast driver. M22 is also no slouch. Both still need a sub. I can listen to the M22 for about 2.5 hours. I can listen to the Proac for the rest of the day. It a matter of preference. M22- metal drivers - lots of detail/very neutral lots of ummpphh Proac - silk dome/paper drivers - detail but a little laid back/subtle - very very deep sound stage. One thing to note the PRoac is 2.5 - 3 time the cost of the M22. If your centers are Axiom stick to all Axioms to have consistant tonal qualities - better for surround movie and music.
The M22 have nore detail than any of the Dalquist I have listened to.
If you were spending that much look into
http://www.pmcloudspeaker.com/db1.html
http://www.wharfedale.co.uk/evolution.htm
http://www.bwspeakers.com/index.cfm/fuseaction/products.models/Label/Model%20CM%202
Saturn
