I've brewed SMaSH with all plain 2-row and loved it. I've brewed SMaSH with a proportion of home-toasted 2-row and loved it. I've brewed SMaSH with Vienna and loved it. The latter two are more complex, obviously, but just plain ol' 2-row and some hops makes a damn fine beer.
I'm not sure at all about your all-wheat idea. I think you'll end up with a mess and disappointment. I don't recommend it at all, no matter how much rice hulls you add. All-wheat mashes are specialized things requiring specialized techniques.