I tried them all out at a store and loved the BOB Revolution best, you may be able to get a cheaper one on Craigslist?...the newborn adapter (for the carseat) is insanely expensive but has really come in handy, we've been running with him since he was 2 weeks old...the newborn adapter only works with a limited number of carseats...it wasnt the carseat that I had, but I was able to get a Graco Snugride for $35 w/carseat adapter for the car (a great deal) on Craigslist and we actually use that carseat more than the one we were originally gonna use
Here is a pic...he's on a pillow cause we were just walking with him this time and its pretty darn secure...if we were running, we would have had him in the carseat strapped in...