Welcome and your car looks awesome!! Definitely wouldn't expect to see a "chic" driving it, so kudos!!
Not a N54 expert so listen to scalbert and ATL E92
I'm at Kennesaw State so I'll look for you and that badass E90 on the road
As far as service goes, I use Nalley in Decatur as of right now and they're pretty good to me. United's got some positive reviews so I might check them out myself. I'd imagine that you should mention the HPFP so they can at least look at it (there
is a recall after all). Plus I say take it to the dealership as long as you have that kickass CPO warranty.
Again, sick car, welcome, and thanks for serving.