The 1.7s are now mine! Muhahaha
Just got back from a 10 hour roadtrip to pick them up, still tweaking the final position, but they sound utterly fantastic! I'm powering them with the 7500 fed by a 990. The 7500 puts out oodles of clean power for them; even when running 5 full range Maggies it gets just slightly warm. It's a beast!

Front of the "Chamber"

Rear of the "Chamber"