Jogging stroller system?

Im an avid runner and first time mom due in march...i know i would like to have a jogging stroller but i see tons and dont know how to choose! I would like one that connects to the car seat so i dont have to get 2 strollers...i see a lot of baby trend brand and graco brand...why is baby trend so cheap? Im all about saving money, but is it any good? Stroller good? Car seat good?