Personally, I would save up for the ecotech radion XR15 G4. I have this on my 40 gallon and I absolutely love it. I have seen a big difference in my corals compared to when I used 2 T5's. You can also set the timer in the reeflink system and the lights can also dim down. So if a budget is the issue and you need something now, go for the cheapest working option, but if you want to save and upgrade.. I recommend the radion.