I've got a mahogany body, 1piece maple neck + indian rosewood sevenstring.. I've currently bought a blackdog 7 for the bridge position - it is amazing.. really amazing full bodied sound.. for those who think a BD won't cut it in metal applications- wrong.. what I have noticed is that the BD gives me just the right amount of gain/cut/clarity/body..
I've been playing a crossover of genres.. using clean/crunch/full out metal and in combination with my MB mark 5 it's plenty tight and I have not experienced any dramatic changes in gain levels.. i do not need any boost, nothing.. i'm really enjoying the combination and I'll be swapping out the PK neck pickup in short time i hope.. for something alnico 5 based, medium/lower output as well to match the combination..
Ive had an emerald in the bridge position just before I changed it.. emerald was a slightly more sharp with sharper cut and maybe a faster response as it does not have that uberfull bodied.. it had a lot more upper spike/trebles which some may like and some not.. it reminded me of an alnico version of the painkiller i used to have as the first pickup but with less piercing trebles..
It's also important what amp you use, what music you play and what you are looking for.. good luck, it's really about trying it out..
I'd recommend you the BD,HD and Abraxas for your style..