Originally Posted by benzy89
Only go by 1st hand accounts, but Rallye BMW should be good since they sponsor almost all the East Coast BMW events (Eurofest, Bimmerfest East, etc)
It's not just the dealer tho, it's getting a quality SA... I got lucky with my dealer & they're all really cool guys. No problems with my FBO car, just remove the tune everytime I bring her in for service.
You might still be told by an SA to take off mods when doing warranty work, but a good SA will let you know before hand and not void your existing warranty.
btw, a tip goes a LONG way. always tip a good SA. build a relationship. profit.