I agree with pretty much everything in here. I love magnum in all of my malt-forward beers, because it provides a clean bitterness that is very unobtrusive. In my IPAs though, I like my bitterness to stand out an fight a bit more, so I use CTZ. Simcoe/Citra is a good combo flavor wise, and maybe a half-ounce or so of each at FWH might bring out a bit more of that flavor, along with bumping up your initial IBU. Thirdly, I think you might end up a slight bit on the orange/amber side of the IPA, but I love munich in beer, it adds a lot of character without the sweetness of crystal. Sounds tasty.