FYI - $650 for the SONOS Amp. Sounds a little better than the old Connect:amp, but not Audiophile. Instead of wiring in parallel, you might want to look into an Impedance matching speaker selector box if your speakers are rated at 4ohms. BTW, the new unit is rated at 125W/8ohms and 250w/4ohms.I think I can use the trade-up program to get one for ~ $450. I have some of the sunsetted legacy products mixed into my collection that I can sacrifice. Sounds like in-ceiling and audiophile don't jive, so it looks like I'm aiming for background music... ha ha
Based on what I'm seeing here, I'm kind of wondering if it's even worth upgrading the speakers from 2-way to 3-way of some non-super-expensive brand.