if you are using it for just running, then i would recommend getting the stationary front wheel (non swivel) and perhaps look into a Chariot. they have suspension on the rear that makes for a smoother ride for the kids.
if you plan on using it for standard stroller uses, i would HIGHLY suggest getting one of the ones with a swivel front wheel that locks in a straight line for jogging. the ones with a swivel are waaaaaaay easier to deal with in stores and crowds since you don’t have to lift the front wheel off the ground to turn.
good luck getting two kids to be cooperative for the run though…