Since your going more for sound quality, i'd rather go with the eclipse aluminum, rather than the titanium. It sound incredibly clean for being made of aluminum. The titanium on the other hand is kind of heavy, and there will be traces of overhang here and there. So honestly, save a few bucks and go with the eclipse aluminum. They do produce some pretty good SPL too. Everyone is saying that Lambda is good. I haven't heard it personally, but from everyone's own ratings, i'd say it's a bang for the buck. JL's are great, but only if your are going for W3models and up. Or better yet, go for a JL13w7. They sound incredibly clean, and go extremely loud. Somewhere on the web, i read about a single 12 hitting 140.1db in a sealed box. It also sounds a lot better than w6 models. Or be like someone i seen who shattered the rear with 2 13w7s on their mercedes. So yeah, i'd consider those subs
