Audio Encounters carries Magnepan(at least they used too)...they are off of Bethel i think...really close to LaScala.
Martin Logans are electro-static(big difference) i used to own a set, the Maggies were a tough act to beat, but they overall look of the Martin's won out.
oh yeah...the MMG's are usually on manufacture back-order, people use them as all channels, even center, so there is a staggering demand. my advice would be to never buy anything from Progressive, they want way too much....check out www.Audiogon.com there are a lot of demos and low hour equipment on there from true audiophiles.
oh yea, you should also plan on buying an amp, "planar" speakers love power, they draw amps like no other.