J.
Hi there!
A child should not be forward facing until a minimum of 1 year old and at least 20 lbs. I would say the Britax are VERY worth it. Please note that if you get the Britax Marathon, Decathelon, or Boulevard, then they go up to 65 lbs where most other car seats only go up to 40 lbs (The Britax Roundabout is a great seat, but only goes up to 40 lbs.). Therefore, you might end up having to buy yet another seat (besides a booster), thus defeating the $100 savings. I have the Britax Boulevard and LOVE it. I love that it even has the genuine side impact...one of the safest seats out there in my unprofessional opinion. My son seems to be very comfortable in it also. The Britax seats are very easy to adjust even with the child in the seat (many seats you can't adjust the harness unless the child is not in the seat). I bought mine brand new on eBay for around $200 + $35 shipping back in March/April (saved me about $100 for this seat doing it that way). Albee Baby has some of their Marathons and Decathelons on sale (see http://www.specialtybaby.com/britax.html ). Anyway, for the Britax seats that go up to 65 lbs, I think the extra money is very worth it. I'm hoping to only have to buy a booster seat after this one.
J.