Biocubes are good tanks, but the lighting is lacking. If I could upgrade one thing it would definitely be the lights, and that's usually pricey on top of the tank price. If you only want softies and some LPS then go right ahead
IMO go to nanocustoms and buy the tank only, and buy maybe a 70w sunpod or a FNI 70w pendant. Unfortunately there aren't many T5 fixtures that would fit this tank if any at all, and LEDs are of course pricey