Welcome to AquariumAdvice
First off, if price wasn't an issue, it would be bigger than 100 gallons... but thats just me! ;o)
for 100 gallong set up, I would go reef.
I would have halogen 10k lights with PC
lights would be in a single enclosure that was tiltable/retractable for easy tank access.
The hood would also be ducted with an external exaughst fan. (Blows the heat out and I don't hear the fan
The tank would need 2 drilled overflow boxes at the top of the tank
I would have a closed loop with random water output for additional water movement.
I would give the display tank 4-5 inches of argonite sand
I would have at least 3-4 different types of live rock and I would use all live rock, no base (since cost isn't a factor...) I would put probably 150-200 pounds of said live rock in the tank
A sump of 50 gallons with a built in refugium
the sump would have 6-8 inches of the same sand as well as a ton of macro-algae
The sump would also have LR
to suppliment the LR
in the display
There would be chambers in the sump that would be adjustable to control how much water flowed through them. These chambers would be used for bags of GAC
or other occasional filter media use.