1. what size do you need? what's the largest print you'll ever print, or ever want to print? I'd go one size larger than that size, just in case.
2. Have you thought of building your own? I'd imagine it wouldn't be too hard. And save some(or a lot of) green too. Also, what about just using a clean, smooth, sanded and painted flat black(or zone V OR VI) wall?
3. here's a small review on the LL site
http://www.luminous-landscape.com/reviews/...es/pdv-3d.shtmlbut on size, one of my friends works in a lab doing large lightjet prints for critical clients (lots of museums), and he works with 40x50 prints all day. They use a setup similar to a bay-window(with the windows walled up) style , so there is reflectance off of the walls to the site, creating a "wrapping" light that hits from pretty much all the angles. They use daylight balanced flourescents for lighting above. They do critical work, and they build their own, due to the large print size.
-Dan