John Pearse, D'Addario, GHS are all fine strings. I use whichever's handy. The GHS "true mediums" are a good set for a dreadnought tha's bass-heavy but you want to use for something besides just bluegrass rhythm (Shock! "But what else is there?")

Elixrs are best if you have acid sweat and kill strings fast, although I avoid them because they feel slimy and I have pretty good luck with "ordinary" strings lasting.

Peter.