For the money, the AR 12 ga would be a very good choice.

Go with 12 ga for your VP150 as well. I have similar set-up (M60ti, VP150, M40ti and VP100, 6.1 config) and use AudioQuest Slate for the front 3 and Audio Research 8 ga (for 3 X 35 ft run, could not afford anything more expensive) and they sould great as a HT system.

Regards,
HT_Man