I had the original XL strings on the Longhorn(I never leave rounds on), but switched to Chromes and on one amp they sound horrible and on the other(Rumble) they sound great. I am gonna put Pressurewounds on the Longhorn and then I will know what works best, having tried rounds and Chromes(my personal choice most of the time). I know I don't want regular flats, as I was getting into Rick territory with rounds...and I still have the other brands in a drawer...
PS - I just took the Chromes off of my Longhorn and put GHS Pressurewounds on. I AM IN LOVE! Right in between Chromes and half rounds, and none of that soon to be unsightly blue silk!