Thanks for 'guinea-pigging' it for me!
I had almost bought the G4's just before the Rally, but decided to research a bit more first & I'm very glad I did. The Sena appears to be very superior to the Scala, only loosing the FM radio but gaining the stereo bluetooth, range, better control/construction, 4-unit pairing, sound quality, etc....
I'll pick up a little samsung bluetooth mp3 player which will give me radio/tunes without wires. I'm looking forward to this setup, as I think I'll be taking off for some long solo rides soon & maybe an ironbutt this fall.
mrhit.com is the best price I've seen ($270/pr w/ free shipping). I've seen some gripes on ADV about rocketmoto too - is his price significantly better than that?