Eric,
I think you've made a good choice of speaker! (If I say so myself, as a co-Maggie owner)
I'd say definitely stretch and go for the 1.6 if you can.
Later, when budget permits, add a subwoofer - a good one- like a Vandersteen or REL to really have a fun time with the Maggies. It will make a profound difference in the listening experience with the Mags.
Regarding amp; I am limited in budget too. I went with the Outlaw 755 (5 channels at 200 wpc; buy directly from outlawaudio.com) Been very pleased with both the power and presentation. They're $1300 new, via phone or online order.
Consider biamping the speakers, which will necessitate biwring them too and using four channels of multi-channel amp. All well worth it when you hear what they do receiving that much clean power.