gonk,
That's a good point. I wouldn't expect any sound from the rears if they are disabled and the 1070 is processing a 6.1/7.1 digital signal. Hopefully, with the 7.1 input toggle set to either 'bypass' or 'hpf/lpf' it would just pass the signal through, but you never know. Then again, if I leave the patio door open maybe I can use the patio speakers as the rear speakers for a 7.1 setup
Anyway, I'll be sure to post back here if I have time to investigate this any further. I am leaning towards keeping the RR2150 and still have my fingers crossed that the Outlaw's will offer some sort of upgrade from the 1070 (like they did with the 1050) ... just weighing my options.
For outdoor speakers, I picked up a pair of Yamaha NSAW150W on sale for $80, not exactly high-end but they sound very nice with the RR2150 especially with the Bass EQ set to 80Hz. The sensitivity is rather low at 80dB, they're also 6ohm impedence so I don't know how well they'd work with something like the T-Amp. I've read a few reviews where users have complained that the volume has to be turned up to a relatively high level to get a decent amount of volume...certainly not a problem with the RR2150 though
-John