Thanks both. That LG at JL might be perfect, just the right depth for me too. I've noticed some are really deep these days.
Not quite sure what to think after watching the video on the JL page though, that's got to have the weirdest sound effects I've ever encountered in a product overview video!
Price seems good. I've always been under the impression it's not worth paying for an extended warranty, would you agree? The warranty on the LG is only 2 years, whereas some have 5 years. It's £95 for the 5 year upgraded, so I guess £30 a year for the extra 3 years. Worth it or not?