I definitely do play metal, but I have other guitars in E standard tuning that sound heavier and better for it (the Rebel Yell, in fact, does an amazing job of bringing a little bit of an edge to an otherwise not metal-dedicated pickup).
I have a love/love relationship with the Crawler. I took it out of an EXTREMELY RESONANT Strat once because it sounded too big; all my carefully-crafted tones built for another guitar ended up way too bassy and middy when switching over to that Strat :P But in all other, more balanced sounding guitars I had, the Crawler did a perfect job of nailing that middle-ground between vintage and modern, and adding a lot of thickness and power to the tone.
Guess the Crawler also matches the output of the current pickup which will make it sound better with the neck pickup... It'd be an easy choice, but I keep thinking there are other BKPs I've not tried out there which may also work!
WOW! Prices have gone up A LOT! I paid ~GBP102 for my latest covered BKP, now it's GBP129 :( Even accounting for historical exchange rate that's a 25% increase :( On top of that it looks like the new website made me lose my history of BKP orders which dated back to 2006... that's a bummer :( I don't think I'll order much at these prices anymore.