So I need some advice. I want to replace the pickup on my guitar. My guitar is a Japanese 1987 Ibanez Roadstar 410. I love this guitar because it only has a single humbucker in the bridge position and a volume knob. And it plays great all over the neck, stays in tune...just a great little Japanese guitar. This guitar has a basswood body and bolt on maple neck. My amp is a Peavey vip vyper 2. I just can't get a good metal sound (if I turn my amp up, it ends up sounding nasally and with no balls now matter how much I fuss with the knobs. I play in drop d most of the time and dream of a thick, full Helmet-like distortion. I love vintage thrash, but all aggressive metal (think more Slayer and less Iron Maiden). The current humbucker is askew like some were in the 80s. I don't mind modifying that so it's in a normal (parallel with bridge) position. What pickup do I upgrade to?