There are still brands like - AquaLight , ATI , D&D, Incoming New Macro range, ELOS, Aquamarine moonlight, DE Lighting, Aquaconnect, Aquamedic.
I feel that there is no such thing as best systems, as it depends on your tank setup, corals you intend to keep, space given, after sales product support and lastly your budget.
The best systems will come when you are paying with your arm and legs
Not forgetting brands like raindow, dymax and jbl also offer good T5 systems.