D.W.
I totally skipped the infant seat with my second and went with a Britax that went from 5-65lbs. She's 2.5 and still using the same seat. The only downside was that you couldn't take it out of the car but I usually carried my tiny one in a wrap or used my son's old seat if we happened to be going out. I'd toss the old infant seat in the trunk and pull it out to take in the restaurant.