Please take my poll on which Britax you like the best..

[Calideedle]

Just beware, the Frontier is having some MAJOR install issues and doesnt have very high top harness slots

Many people who were the first to get them have to return them because they cannot get an acceptable install and their kids are about to outgrow them.

That said I will still be trying the Frontier out in my car

[Psychomom]

I voted for Marathon because of the 3, that's all I've ever tried/own. (We own 2 of them.)

[isabel249]

There wasn't a choice for ours... we have the Britax Diplomat and absolutely LOVE it

[teachermama]

I have owned all three of these at one time and still own two Boulevards and two Marathons, plus a Roundabout. My personal preference is the Boulevard because of the TSIP and the knob adjusters for the harness straps. It also has a lot more support for the infant if that is who you'd be getting it for. Both my two younger kiddos were/are extended rear-facers and it didn't/doesn't cause any issues with that either. Good luck trying to decide! (oh, and if price is the issue, I have NEVER paid retai for any of our seats. In fact most of them were at least $100 below MSRP, you just have to be aware and buy on sale with coupons! )

[jlr5979]

We just got a Britax Regent for our older son and I love it. It's a forward facing only one because he was about to outgrow his other five point harness. He's got so much room now in his Regent, it's definetly the last carseat we will have to buy. When he is done with it, it should be just about time for his brother to move up.