You will have more color options for your bulbs if you go with the T5 fixtures. It took me almost 2 months of searching and researching to pick mine. I am on a budget so I went with the aquaticlife 2 bulb t5 fixture that allows you to hook together up to 3 fixtures. This way I can get one at a time and eventually get 6 bulbs.
If you are trying to put it in a canopy though, I think you should look for retrofit fixtures that will allow you to do that.