The "MA" combination is the weak link here. Since those two letters repel each other so much, I would spread out the other letters so the "MA" gap isn't as pronounced.
Here are some of my favorite bold extended fonts:
http://www.fontshop.com/fonts/downloads/font_bureau/rhode_wide/?&sample_...
http://www.fontshop.com/fonts/downloads/font_bureau/stainless_extended_o...
http://www.vllg.com/Thirstype/Orbit
http://new.myfonts.com/fonts/ortizlopez/olfranklin/
http://www.typography.com/fonts/font_overview.php?productLineID=100013
(al the "Sumo" weights)

