Where do u see the SZs on sale for $77?
Anyway, I'm running 5 of the SZs in a 1650 cubic foot sealed room. They sound really nice. Nice midrange and vocals, pretty good highs without being harsh.
There's a few more reviews of the NHTs than there are of the Emotivas. Neither is very efficient. Mine are pretty good with movies but need more power than I have for music. (45 watts/channel).
And of course you really need a sub with them.
As much as like them (for the money they're hard to beat) I wish I would've gone with something larger though. I'm not sure more power is going to fix their lack of output for music.
That's my $.02.
Klipsch RF-62II, RC-500, RS-400, SVS PC12+,
Def Tech SC8000
Harman Kardon AVR 1600
PS3, Apple TV, Sharp 70" Qattron