Well as an update, I ordered the X1 two Saturdays ago and canceled the Subaru BRZ.
I wasn't sure about the road noise because that has been noted by some posts and reviews but overall I decided it was likely not an issue. My previous car was a 1999 VW Passat which was sold and I'm currently driving a 2003 Pontiac Vibe. The Passat was quite quiet at highway speed... the Vibe sounds like the window is cracked open. The app I used... some generic sound meter app I found registered over 90db at 70 mph. Yeah.
I don't doubt the X1 is going to be a vast, vast improvement on that. Just a few more weeks til she arrives!