A good t5 fixture with the right bulb combo is hard to beat. If you're having good results, I wouldn't be in too much of a hurry to switch. A change now is just another, usually large, cost that you can't guarantee good results from. Don't get me wrong, I love my LEDs, but there kind of in the stage now where people are still figureing out what is working and what is not and the fixtures are evolving so fast to the "newest" reef combo of leds to get optimal light spectrum and spread for growth and coloration.
From experience any LED fixture that utilizes just whites and royal blues is a thing of the past and not what you want to get. I actually added T5 supplemental lighting to my AI sol blues so that I could get better coloration from my corals. I'm wanting to upgrade my sols, but they keep coming out with new lighting options every 6 months, I don't want to drop $800 to upgrade and STILL not be 100% satisfied with the results.