I would highly suggest the 25.2, but I would also factor in:
50 watts @ 8 ohms & no tone controls. If you have a large room & like to listen really loud, 50 watts might fall short. I have paired my 25.2 with Focal and Wharfedale speakers; and have been very pleased with the results. Do you have a chance to demo anywhere around your area? If not I would suggest a retailer like MusicDirect or AudioAdvisor which carry a 30 day money back guarantee. -Z

Z makes some very good points regarding room size, power and no tone controls.

I, too, have a Music Hall A25.2 along with matching cd player and tuner. When I first purchased this system I also bought the Epos M12.2 bookshelf speakers. I upgraded to the Epos ELS-303 (a smaller floorstander). What I like about the A25.2 is its' even sound...no need for tone controls. Although, if you are looking for a very heavy bass you will have to swap out the opamps - that's another discussion, though.

Just recently Epos (a British loudspeaker that is distributed by Music Hall)came out with a 4 Ohm loudspeaker that was recommended for use with the A25.2. Beings your Monitor is a 6 Ohm, 2 way similar to the Epos there should be no problem driving them.

The room that I have the MH set-up in is 10x14 and it does a fine job. I highly recommend the 25.2 system and it should work well with the Monitors.