I have a very similar light fixture on my 55 gal (260W, 3 seperate cords/switches, reflector, 4 LED moonlights, legs) & I got it on ebay for like $79 plus shipping new.
For a deeper tank you would want something a bit stronger as suggested.
Ive had a great experience with hombby brand MH lighting. They'v worked great for me on my reef tank. I only have LPS, Softies, shrooms and polyps but all look amazing and grow like crazy! The man who deals with customers and is real helpful and even sent me a new bulb for free that was broken during shipment. In my opinion a pretty good product