This!!!
I did about 20 hours of research before we bought a new one a few months ago and what it comes down to is that they're all very safe as long as they're installed properly and fit the child. The main differences are features, we got a Chicco with a zip off cover which has been very nice. Check Babies-R-Us they were having a great sale when we bough and it looks like there are some good sales now. The one we bought is $70 cheaper than Amazon at the moment.
Here's the Britax review that changed our mind.
We've always used Britax in the past but one feature on the new one we were looking (Advocate) at kept us from buying. Basically, if there's an accident the belt has to be cut.
"5.0 out of 5 starsSaved my sons life!
By Amazon Customer on December 24, 2015
Color: Black We have the advocate Clicktight and I can't say enough great things about it! My son is almost 3, 40lbs and 40" and is forward facing in this seat. We recently were in a horrible accident at a high rate of speed and this seat performed the way it was suppose to! This seat saved my child's life.
The only down fall to this seat is that in the event of a crash, you must cut the seat belt to your car in order to remove this seat with the child still in it. I've always carried a seat belt cutter for this exact reason, but it did confuse the fire department and it took lots of yelling from me and direction before they figured out how to remove him as they were trying to pull the seat belt through like you would a normal car seat. I will be providing them with my seat for training purposes. "