Amazon currently has the Britax Frontier 85 Combination Booster Car Seat for just $185 shipped!

• Highest 5 point harness seat capacity allows your child to remain harnessed up to 85 pounds or in booster mode to 120 pounds
• True side impact protection distributes crash forces, shields from vehicle intrusion, contains the head and body, and keeps the head, neck and spine “in true” or aligned, to limit injury
• Patented versa-tether introduces a staged-release tether webbing that anchors the top of the child seat at two points to minimize forward movement in a crash
• Quick-adjust head restraint and no-rethread harness easily adjust the harness shoulder height and head restraint without disassembling the harness