Haven't had a chance to use the Pacific Gems yet, so I can't comment on them... I think you might be heavy on the aroma hops for this style... see the BJCP style guidelines for more info:
From what ProMash gave, your OG should be around 1.077, so you should shoot for 18-20 IBUs to keep the BU/GU ratio correct for this style (average ratio is .24-.26)
I personally don't care for the Briess malts in anything other than American style beers, just not enough flavor in the pilsner or pale malts for my taste... they seem to be lacking something when it comes to the European styles... YMMV and all that...
Maybe add a few ounces of peat malt (go easy, it's strong stuff) for just a hint of smokiness in the background...
Also think about a longer boil to get some carmelization flavors as noted in the style guide (not necessary, but does add a nice complexity to this style IMO)
Overall, this should be a very malty beer that is balanced by the alcohol instead of the hops...
Good luck, and let us know how it turns out