I have tried three different strollers, and by far love the CTS system. First off, I will say that there is no stroller that you are suppossed to run in with baby's under 7/8 months old with out good head control. There are several strollers that you can buy special 'inserts' for that allow you to have younger baby's in the stoller.

http://www.baby-jogging-strollers.com/scstore/p-1371210BB.html

I had a baby jogger II and that was pretty late weight, but it had no cover for the baby. And for the heavy price, they sure are spendy. Durable buggers though. I cannot remember the name of my second baby jogger- but it was purple.

Now, I have the Cheetah- one seater, and it is awesome. Lightweight, has a cover so my child does not throw anything out of stroller. Has a sun cover and a rain cover as well. I can covert it to a bike trailer as well. It is fast and easy to take down and put back together and if the bike tips over, the trailer does not. Finally it has a comfy 5 point harness system and room in the back if my child wears a bike helmet. It also has a arm strap to put on my wrist. (I watched the news one day where a baby jogging stroller rolled into the street and the baby was killed by a car. I cried so hard) It is spendy though- $300 at costco with the stroller jogger. The cougars are the doubles- and about $100 more.worth it - quality- and if have money to buy a BOB- maybe something to consider.

Here's an article on some recommendations:

http://multiples.about.com/od/stroller1/tp/twinjogstroll.htm

But really look for this:

1. Jogging strollers with bigger wheels (about 20 inches) are able to move more smoothly

2. Comfort and Practicality - for you and your children. Is it easy to push, maneuver. 2 kids are heavy- a lightweight frame helps ease the burden of the added weight.

3. Durability - $100 jogging strollers do not usually withstand test of time (or in this case miles)

4. Safety - arm strap? strong frame? brake if no arm strap?

5. Warrenty/Return policy. No matter how much you pay for a stroller and how much research you do- what if you get it and it just does not feel right? Like my second stroller? Ensure that where you buy it from has a decent return/trade policy.

Schwinn, Bob, Instep, the REI CTS systems are all pretty safe bets.

Good Luck!