If you have the money buy a BOB. They are the top of the line. If you are like the rest of America today and are looking at a good deal you might want to check another brand.
I have an Instep Safari. I love it! Some of the features include: a swivel wheel that will lock into place when running(this makes it really easy to maneuver in small spaces like the mall and have all the stability wanted while jogging), It has a car seat adaption bar I was able to use the car seat I already purchased and it adapts to most brands, my husband really likes the fact the handle bar adjusts he is 6'1" and I'm 5'3" it has comfortable positions for both of us, It has great storage below, and has bicycle tires for a little rougher terrain. We were able to buy it for under $150.