I have a Washburn Wi-14 Electric. I bought it at Sam Ash, and had it professionally setup buy their guitar tech. I had him install D'Addario XL (Extra Light) strings since I was, and still am a beginner. I have found that particularly the Low E string has a tendency to rattle or vibrate. I looked at all of the frets, and I can't see anywhere that it's actually touching. The action was pretty high on this guitar when I got it, and it was better after the tech worked his magic.
Anyway, today I was messing around with "Never too Late" by Three Days Grace, and tuned it for Drop-D. This made the E string about 10 times worse.
So, my question is, would a set of Light, or Medium-Light strings solve this, or was my guitar improperly setup? The XL's I have on it now are VERY light. I don't have calluses yet, and it's even easy to hold down the High E, on the 1st fret. Something I can't say for my acoustic with Super Slinkys (I believe they're Light, 11-52 gauge).