I've had good luck with everything I've purchased from
Greenhouse Megastore | We sell the things that make plants grow. Hobby Greenhouse Kits, Garden Supplies & more!, despite the cheesy name. Worms Way, which has a decent website, also has all kinds of lighting systems and offers several T5 fixtures. If you still want to consider LED's, Bird's Botanicals in Kansas City has some affordable options. They had a nice demo at a recent show I attended. Bird's grows all their plants in a cave, so everything is under lights. Of course, you'll always great things said about First Rays, too.