I was a Martin Medium gauge guy for a lot of years, until i got the twins... (A pair of Seagull, -A- series 'Folk' guitars) Now they live with Martin lights...I've tried Elixir, and quite frankly the only thing I can say impressed me is that they didn't have the initial HARSH brightness that uncoated strings have... (I HATE new string sound!) Other than that, they seems like a whole lot of buck for very little bang... And on the off chance I break one, they're just too damn'd costly...
for more details on my gear, check out swordforhire.org
;-)