The car seat is ordered and will arrive tomorrow. How's that for fast shipping?! THANK YOU so much for all of the input you gave me! It really helped a lot. I feel totally comfortable with our decision. We went with the Mar.athon in onyx and purchased it for $207 and change at dia.pers.com - what a deal!
I'm a little sad at the thought of packing away Elliot's infant seat, but I know he'll be so much happier in the big boy one!