You don't want more low end with thick gauges. Strings over 60 thump so much lows already. Also thicker strings sound louder, so you don't need as much output as you would with thinner strings. The dilemma here is that you don't want your pickups too bright, especially in the high mid area, because unwound stings like 13, 14 & such may sound awfully harsh. If I were you I'd give a call to the company I wanted to order pickups from & have a chat with them; you already have experience with their pickups so it should be easy to find out which one should suit your needs better.