Looks good to me. My APA is about 4.5% and it's straight forward Two Row, Crystal 20, Simcoe @ 60 and Cascade @ 30 & 15 & 5 and dry hop w/ Cascade. Beer is great and I've won several awards w/ this beer. So I may suggest adding a dry hop step to get a little more hoppy aroma/flavor. Me personally, I think I would go with Amarillo rather than SA.
I've been thinking about trying Munich in my APA to get a little more malt character, but I"ve never had anyone say that my beer was lacking it. Still may try it to see what it does, but I can definitely see its advantages in a 3%-4% beer.