What are those reasons? We have always been Britax fans, but I just saw the Graco MyRide in the store last week and it looked pretty nice. We won't need a seat for about a year, but all of our Britaxes (well, except 1, but my son will likely still be in that one) will expire before our youngest will need them so I am looking around.
Some of it is simply personal preference. Some is value, I find the Britax seats overpriced. They USED to be a leader in the field, now the other manufacturer's are catching up to them, and in many cases exceeding them.
Specifically, the MyRide is significantly less expensive and has a higher rear-facing weight than all Britax seats on the market. It has a 65lb forward-facing harness, same as the 'big' Britaxes.
The First Years True Fit is similar to the Marathon et al, but less expensive. It has a removable head portion, which makes it nice for smaller babies. It has some of the upgraded features of the Marathon, like built in lock offs.
The Evenflo Triumph Advance is much less expensive as well. It has side adjust knobs rather than a center adjust strap on most car seats which I personally find easier to use. It's a nice deep seat and it has an infinite harness, making it a great choice if you are a caregiver who has different children in your vehicle.
All 3 of the above have significantly more leg room than the Marathon/Boulevard, making extended rear-facing more comfortable for older children.
Ultimately, though, if you choose a convertible with at least a 35lb rear-facing limit, a 50lb forward-facing limit, your child fits well in it, you like the way it works (harness adjust is easy for you, etc) and it fits in your budget...it doesn't really matter which one *I* like!
