If it's fowlr
only then any lights will do.
Just up to you about how much light you want in the tank and the coverage you want. I prefer to cover a whole tank with light so I would get a fixture(s) that will go completely across.
I think you might be over shooting with the rockjust a little. Typically in a fowlr
that large you will want large fish, so the stacking of the huge amounts of rock like for a reef arent really necessary. You want there to be a good amount of open space for swimming of large fish.
If it were me, I would start with say 300 lbs and go from there. You can always add base rock after with no ill effects. It;s the live rock that you dont want to add after a cycle has been completed as it can cause a mini parameter spike, though with a 360g that probably wouldnt even affect the overall tanks parameters.
Sounds like a great build, I wish I could go from my 180g up to a 300+ gallon tank. Sooo much fun!!
Any ideas on your stock list? And are you 100% certain you wont go reef? That will determine the lighting needed as well.