Why all the power? I use 3.6R maggies and can get by with a 75 watt tube amp for about 95% of my listening. Sources are vinyl and CD/SACD. I would suggest you spend a few sessions with one of those Radio Shack SPL meters to get a good idea as to how loud you listen. If it is less than 95db, 50 to 75 watts may be all you need. Sure, if you decide that you gotta have that last 5% loudness, then get a cheap class D pro amp for the party times. Email me if more questions.
Cheers!
Cheers!