Mick, I haven't heard the Rogue, but they have an excellent reputation. And, that McIntosh amp is beautiful, but I don't have any idea how it sounds either! One thing to consider is that unless you listen at very high volume levels, you may even be happy with lower-power amps. I rarely come close to exhausting my 15 watt per channel amplifiers with 90dB speakers, but I also live in a pretty small apartment and have a finite tolerance for loud music.
I have a few different tube amps and, funny enough, the least powerful one delivers, by-far, the best bass I've heard in my system ... brilliantly resolved, even through 4 ohm speakers. Many factors determine this, but perhaps the most important is the output transformer. As Dave noted, the Rogue is pretty solid in this department. In any case, I'd expect both the Rogue and the McIntosh to sound very good, but I'd really make an effort to hear them in your own home if possible. Good luck!
