it's definitely going to depend guitar to guitar...but on my martin j15 (mahogany, jumbo..very dark) i have martin marquis mediums. they bring out the top end, and obviously the mediums bring out a great bass tone that's very clear. i have a cordoba classical that i use rectified saverez's with normal tension. very even sound, and the treble strings feel so smooth to the touch. i used to use d'addarrio on both...but i don't think i can go back now.

I personally like Elixir mediums. I use them on my yamaha. I'm pretty new to acoustics but I definitely like these better than any others I've tried. Definitely a very thick and full sound.

I have currently put DR Rare 10s on my 6string (jumbo, maple top and body, bright with bite) but I have to play it a while more before making a judgment on them...

I've always used Martin Silk and Steel's on my 12 strings. Have tried Elixers but they're just not worth the cost. I use Elixers on my 6 strings, but for the 12 it's the Martins all the way. On electric 12's I use D'Addarios because they have a wound octave A string as the Martins have a plain steel octave A. It will make a difference on acoustics that aren't using a bridge pickup. The unwound A string rings out loudly, overpowering everything around it. If using a Dean Markley Pro Mag pickup on a 12 string acoustic, I'll replace the octave A with a G string, (wound,) to eliminate the boominess of the unwound string. (I consistantly tune my 12 strings down a full step anyway.) With an electric pickup the problem is the same so the D'Addarios address this issue. Electric is a different animal anyway.

Elixir lights here, will never go back.

Elixir all the way

i use these martins on my yamaha, medium gauge, they sound real twangy, but aren't very easy on the fingers, but you get used to them

Elixir all the way! I personally use the nanoweb. They last a hell of a long time and sound great!

i like dean markley med lites. i tried martin and ernie ball both of which were decent, but i think i like the markleys better. i tried a couple sets of elixr to see what all the hype was about, and personally i didnt care for them at all. but everybody is different.

The Elixir are the best sounding, longest lasting strings i believe, smooth action on them