I need to purchase a new fixture for my 30 gallon mixed reef. I currently have a dual lamp Glo brand T5 fixture that will be moved to my wife's 20 gallon fowlr setup. There aren't a lot of options for 30" fixtures and I'm looking for info on what online retailers are good, 24" fixtures that will fit (might have an option to hang it), and an explanation on why I should spend more money on T5 versus the Odyssea power compact 130w fixture I found for well under $100.

Really any help will be greatly appreciated.