JM Lab Mezzo or Red Rose classic??

I am not that familiar with the Classics, though I have been very impressed with the other Red Rose speakers. The JM Lab Mezzos (or are you referrring to the Alto Be?) are terrific and the company is one that should be around for a long time (though, one can never can tell these days). I would opt for the Altos over the Mezzos if possible as they are quite an improvement IMO. I would suggest adding a few other contenders that are also very good: Genesis 501s (alot less expensive than the Altos and right up there sound-wise); Meadowlark Blue Herron II (I have not heard these but understand from a friend with better ears than me that they are fabulous) and lastly, the Linkwitz Orion (a DIY speaker designed by former Audio Artistry designer Sigfried Linkwitz, www.linkwitzlab.com). The Orion is the least expensive of the speakers mentioned and IMO arguably the best. Supporting electronics needn't be expensive with the Orions and you can have them made for you in any finish you'd like for under 6K. If you up the ante price-wise, I'd check out the Ascendo System Z and the Aerial 20Ts (I am in the process of trying these out now). Good luck.

can anyone help with this. i am buying the Mezzo but now thinking of buying Red rose Affirmation 400 watts to 4 oms or a good valve monoblocks output around 100+ watts which should be enough for the Mezzo.

Love the Mezzos (but the Alto Be's are better) However the mezzos are available at a good price used right now because the Alto Be's replaced them. I have run mine with various amps including a 300watt Accoustic Art (Germany) and 17 watt Single Ended (Guess Who) They work well with all good quality amps (but can get a little bass tubby with placement too close to back walls) Should work well in your room size though.