I have the Baby Valco Twin Runabout - and I love it!!! I have a 2 year old (27 months) and a 10 month old. It's heavy and big - as most doubles are!
Have you looked at the Baby Bargains Book website for reviews and info?
http://www.windsorpeak.com/dc/dcboar...topics&forum=1. I got so much help there in deciding which one would be good for me. I get a tremendous workout with it too. We are surrounded by hills - so pushing a 25 pound stroller + a 27 pound 2yo + a 17 pound 10 month old = great upper body workout as well!!
Technically this isn't a "jogger" - but many people who are occasional runners use it as such. If you are a serious jogger, you'd need one with bigger wheels. These are 12 inch air-filled wheels. It turns on a dime! I love it! Check out Baby Bargains website. It's great!