I posted this thread a long time ago, but I thought I should post an update/product review incase anyone else was considering this product.
I did buy the eclipse 3 hood (there wasn't much selection for lighting here). You're so right when you say it filters lousy! After a couple weeks I noticed my tank was getting so dirty. I've had to run my Fluval internal 2 a few times to clear things up! The lighting part is really good though; I finally able to grow plants easily.
I also got an Eclipse 6 (I found a used one for cheap.) I find with the 6 gallon the Eclipse filters great, so it's a good system for small tanks, but not big tanks, like the 25 gallon.
(Unfortunately the filter in my eclipse 6 broke the other day
I guess that's the price you pay for buying stuff used- you never know if the person cleaned it properly etc.)
So ANYWAY, I'd recommend the eclipse for little tanks 1-6 gallons, but anything bigger stick with regular filters.