You could also look for some of the pro model La Scalas. Bigger bass driver than stock. They come in a couple varieties (split or full cabinet) and they aren't very common, but can be found. There's also a pro model Heresy - I don't know how or if that speaker differs from the stock model. I have pro La Scalas (full cabinet) and they are all I've ever wanted in a rock speaker, and any other for that matter.
