Looks like a good IPA to me. I'd change the Magnum for FWH. You will get some flavor from a FWH, so you might as well use a hop that will give you the flavor you're looking for (i.e., more Amarillo or Cascade, or another hop in that vein). I also find that FWH gives a more mellow bittering than a traditional 60-minute addition. You may want to bump the IBU's from that addition a bit to make up for that.
I'd also move your 5 minute additions to flameout to get the maximum flavor/aroma extraction from them. I also use a long hop stand to wring every last bit of oil from the hops, but that may be more intense than what you're shooting for. But if you wait about 8-10 minutes before starting to chill your wort you'll get the same ballpark IBU's as a 5-minute addition, but with a lot more flavor/aroma extraction.