WAY too many fish. there's no hard fast inch per gallon rule in SW. FW yes, SW no. It all depends on the fish. Some fish need LOTS of room, like Tangs...cause they are active swimmer. Some fish need hardly ANY room, like Watchman gobies. They stay in one place all day. Predetory fish need even MORE room than most...mainly cause of water volume. They are VERY messy eaters, and if you don't have a good amount of water volume to handle the mess, they can die in their own filth, so to speak.
First thing you need to do is decide if you really want a predetory tank. If so, lighting becomes less important, and skimming becomes MORE important. If you go predetory, you DEFINITELY need a super skimmer to get all the mess out.
You DEFINITELY can't have predetory and SPS's. (unless you have 1 or 2 predetors at most). But as Fly Guy said, LPS's and predetors can work. Even sofites like Xenia LOVE the mess created.
If you do want predetory, and decide you want a few LPS's in there, then you will need PC lighting at a minimum. MH is not really needed. But if you already have it...go with it.
I think if you really want a predetor tank, go for it. Tell your husband he'll have to get his OWN tank for the fish he likes.

Besides, might be nice to have another tank!! hahaha
good luck, and can't wait to see some pics!