After playing around with a few brands when i got started i settled on American Bass. Where I get them, its the best bang for the buck. I've used/installed all of their woofers except for the vfl. The HD is one tough sub and took about 3k daily. My personal favorite is the XFL. Its a little lighter weight but in my opinion, and a few others who i know that use them, performs just as well. I've known someone who ran them at 3k a piece. Not sure what electrical. Never tried that much myself. All around American Bass is a good company with a good product. Obsidian is more budget oriented. I'm hoping to do a build with 4 of their 18s next summer just for kicks. Looks promising.