2 questions for Brompton riders out there:

1) For those of you who own a Brompton with a rear rack, how often would you say you actually use it? Anyone out there who doesn't have one on his or her Brompton and wish they did?

2) 3 Speed or 6 Speed for around town(hilly) with the occasional long day out?

I am going to buy a Brompton in the near future, and I am undecided as to which model (the M3L or the M6R+ or something in between, like an M6L). I would use it mostly for around town in combination with my car. I don't envision using it to go on extended overnight journeys, just long days out when I travel. I plan on getting a touring pannier for it regardless of my decision about the rear rack. I am a road cyclist, so I don't mind getting out of the saddle in a higher gear to get up an incline.

Any comments/advice would be most appreciated. Thanks.