Never thought a string could make so much difference in tone. I have used a bunch of different strings over the years and never thought too much about it. My favorites were Kurt Mangum strings and Gibson Bright Wires. Then a got a hold of a guitar (Strat) with the DAddario XL's on it and wow, great tone. They sound really good and clear without being overly bright. I use, and am reviewing, the 10-46 gauge. (I did try the 09-42s and was not impressed with the smaller gauge.). I would recommend you string one of your guitars with these and see for yourself.