I have a couple of Odyssea 48" 260W light units..
yes they're cheap, but they work, the only thing I would prefer would be if the fans in them were of better quality, but they're not overly difficult to replace.. and I'd prefer it if there were seperate cables for each pair of lights..
I'd buy them again though.
Not quite sure I'd use one of their filters though.. there's a little more that could go wrong there.. (no experience though)