Kehut, are you still around? I just dug up this old thread as I'm considering buying a used pair of 81's. It's been awhile so I was curious if you're still using the 71's? Also, I would very much like to hear why you prefer these to the 81's.
If I'm reading correctly, it sounds as though the 81's might be a little hard to drive? At least with the Odyssey Stratos, which I thought was a pretty beefy amp, and one that I've been considering.
I have a fairly large room ~ 18' X 22' X 14' (WLH) and an open floor plan. I have allot of space to fill. I use an Outlaw model-755 200wpc @ 8 Ohms rms all channels driven and 300 wpc @ 4 Ohms. My current speakers are Energy Veritas 2.3i's which have specifiction very similar to the 81's, but they list 87dB anechoic and 90dB typical in-room, both are 8 Ohm.
Any info you (or anyone else familiar with these speakers) can provide will be appreciated.