Like most smashes, it's hard to go wrong. I think your recipe looks good.
If I had to pick out something, I would maybe consider bringing your bittering addition down just a tad, go for a bit more balance. You're at a BU:GU ratio of 0.62 I would maybe shoot for a 0.4-0.5 for a SMaSH, but that's just me trying to pick on something. I would say with a SMaSH you're looking for a well balanced beer, not hoppy, not malty.
Either way I bet you'll have a tasty couple cases of beer.