Re: guitar heaven
I've been to Guitar Heaven before. It's a medium-size mom & pop type music store in Nashville, and the staff was very friendly. From the few questions I asked them about their guitars, they seemed very knowledgeable too. The coolest thing to me was the long display counter dedicated solely to their hundreds of pickups. I kept having to wipe up my puddles of drool.
I agree that if you want to buy Duncans, Black Rose, Lew, and Guitar Electronics are hard to beat on price. However, for DiMarzios (forgive me guys), Guitar Heaven has the only decent selection I've seen.