for sps dominated, id say ati hybrid or pacsun hybrid. For mixed reef, one of these 3 will be the top dawgs: hydra 26/52, radion pro xr 15/30, or (imo the #1 all led fixture) mitras (but this one is on a whole different price class)
Since all 3 fixtures are comparable, if u want best "bang for your buck", the hydra 52 is the way to go, since its the cheapest of the 3. But remember that it cannot be programmed by itself on a comp, it needs some type of external controller. Both mitras and radion has onbaord controller that can be programmed using comp to run by itself. Ati has a nice contoller included as well.
Youll be happy with any of those choices, theyre all the top contenders in the led world. Each one has its pros and cons. But like all equipment in this hobby, u get what u pay for. The more $, usually the more built in features included.
Note: radion pro g3 has the newest cree led diodes. Others (ati) may not even use cree. If u dont care, then it wont matter to u, if u care, then u should look it up closely and see which fixture has the model of cree diodes u want on it.