M.P.
I have a BOB and love it. I just got a double bob because we are having a second baby. It's even nicer than my single. I bought my single used and it's pretty old. While running you don't want the front wheel to swivel but I use it as my primary stroller so when it came to the double one I bought the Revolution model because you can lock the front wheel or have it rotate. I think it's a pain to have it not rotate unless you are only going to use it for running. They aren't cheap but they are wonderful. I bought my double on Ebay for almost a hundred less then retail, even with shipping. The seats recline really far and it holds 100 lbs of kid. It ways about 32 lbs but I think most double strollers other than Maclarens weigh that much. The sport utility and the Ironman are the ones that have a not swivel front wheel and they are slightly cheaper. But not by that much. REI is really helpful and knowledgeable. That's who I talked to a lot.
Have fun running.