i can't speak for the v12 monos, but i own a pair of cary audio slm-200 monos and i don't think i'll be upgrading anytime soon. the amps sound so great to me. wonderful extension, delicate highs, and a lush midrange. i've never heard anything by rogue so i can't give any input there. i seriously doubt you can go wrong with either.
Tube Amps Cary V-12 or Rougue 150 mono's
I operate a LP-12/PH-3/LS-15. Also Cal Audio CL-10, and Vandersteen 2W with Maggies 2.6. Recently auditioned the Rogue 150 mono's and the ARC VTM 200 mono's in comparison to my Sunfire. The ARC is out of my price point but the Rogue's were great. I am considering the Cary V-12 Mono's but cannot audition because of dealer location. I am considering buying untested because of Cary reputation. Any feedback on Cary/Rogue amp products would be helpful.