I've been using the "classic" L1's for 3 years now and am very happy with it (2-L1's and 4 B1 subs). The new L1's look awesome though I haven't checked them out yet.
Bose has an excellent forum for L1 users for sharing tips or solving problems, theres even a section for DJ and KJ users.
I've got pics at
http://www.myspace.com/karaokespotlight
Sam