If you want to try something different from the X2N, then I'd look elsewhere because the Bill Lawrence is basically the same as the X2N.
Maybe try SD Blackouts if you want to try actives, or DiMarzio Breeds if you want to stick to passives? Both pickups that I'm a fan of myself.
The Bill Lawrence L-500 sounds NOTHING like the X2N, whether you use the L-500 C, R, L, or XL. The L-500 is MUCH more expressive, and allows the tone of the body wood to really shine through. It's a very alive pickup, allowing the acoustics and nuances of your playing to jump out of your amplifier. The X2N is a biting, high output, balls-to-the-wall pickup. The Seymour Duncan Dimebucker is based off of the L-500XL, but that's the closest aftermarket pickup you can find to the Lawrence L-500.
The SD Blackouts are interesting, I'm just not an active guy, so they never really floated my boat.
The DiMarzio Breed set, on the other hand, is absolutely amazing. Lots of nice low end and thick and crunchy, but it doesn't get muddy.
If you don't like those, my personal recommendation would be a DiMarzio Super 3 in the bridge and a DiMarzio Super 2 in the neck (or any DiMarzio will work in the neck, as long as its output is less than or equal to that of the bridge), but I highly recommend you look into the Super 3. Or, try the DiMarzio D Activators or D Activator X.