Hi, I have the aqua reef 195, so a little smaller than the one your looking at but same equipment.
I'm keeping a mixed reef of mainly LPS and SPS, with a couple of softies here and there.
I changed out the t5 lights for LEDs, I went down the aquarays route, as I didn't think the originals would be up to it. Also for flow I added a mp10, and thn the other thing I did was change out the stock skimmer for a bubble Magnus that sits in the sump.
That started me off well and I've also added an auto top up (definitely the item that made most diff to my system, within 24 hrs every sps had much greater polyp extension), and a small reactor.
I don't know the Red Sea tank as I've not owned it but with a few minor changes the aqua reefs are a great tank