H&R makes excellent spacers, some of the spacers that we include with wheels are from H&R. Rogue has an excellent reputation, but I do not have direct experience with them, so I would leave the comments on those to someone who has experienced them firsthand.
Whichever way you go, make sure you are using longer lug bolts to get proper thread engagement.
I have accepted a new position at Tire Rack and am no longer in the sales department. firstname.lastname@example.org
is available to assist with M3 questions.