anyone using them? the Xmitter prime drive extreme look pretty sweet. http://www.visionxusa.com/LED-Xmitter_Prime_Xtreme_Light_Bar/c1_217/index.html this is a setup on a bike they have in their gallery. looks liek a xmitter above a solstice http://www.visionxusa.com/gallery/index.php/Applications/Off-Road/2009/_5020323
Looks a little bulky. I use these home built LED units, http://www.dirtbikeutah.net/light-1.html . I built them with AC voltage drivers so they run off my lighting coil of my wr300. I have 2 on the handle bars and 2 on my helmet for 3000 lumens of light for under $300. LED Supply will build them for you for a fee, you would have to phone them for the cost.
I wired them in with a couple of standard handle bar switches and 2 way breakaway connector for the helmet lights.
those are cool little setups, what kind of visibility do you get with them? (how far out can you see and how wide)
