The "Dimebucker" is a ripped-off version of the L500XL - the highest output 500 - which Darrel originally used. Nuno Bettencourt uses the 500L (slightly less output), which was unfortunately ripped-off and massed produced by someone else for Washburn (long story, on the BL site somewhere).
I would definitley say the pickups are not grainy. They're warm and give you the full spectrum of output without any colouration, as a pickup should. Many pickups give you a particular flavour, but the Lawrences really give you a transparent sound and pick up the materials of the guitar.
I have a 500L and an XL (and 280, 450, etc.) in different guitars and they all sound great at high-gain and clean settings. Both are applicable from metal to Jazz. Seriously- they're great pickups. Bill doesn't pay for celebrity endorsements, but there are an incredible array of guitar greats that use his pickups.
When in doubt, call them and they'll explain everything on the phone. Or visit that "wilde-gate" link (
http://pub123.ezboard.com/fguitarsbyfenderfrm8) on his site for the user-forum.
Sorry- don't mean to keep evangelizing other products on the EBMM forum, but it's just that these are great products and I've been a very satisfied customer.