I've heard great things about Britax too. But we have a Graco snug ride infant seat and evenflo triumph toddler seat and been happy. When I washed the evenflo cover a couple times, the lining got bunched up inside the cover. I emailed evenflo and they sent a replacement cover for free. I don't like the drink holder - it's been through a lot of wear and not doesn't stay on anymore.
I'm also looking for new ones, and am leaning towards Graco myride65 for the infant/toddler. Its rear facing up to 40 lbs. It has 2 "built in" drink holders, so nothing that can be knocked off. I'm leaning towards Eddie Bauer Delux Booster for my 30 lb 3 year old. It seemed the most comfortable at the store, and had a nice cup holder as well.
My personal opinion is that all car seats are made to meet or exceed safety standards. As long as properly installed, any car seat will protect the child. Some seats fit better in certain cars than others, and it depends on if you have multiple car seats next to each other - narrower car seats are needed in that case. It also depends on if you do a lot of long distance car trips and if the child sleeps in the car seat alot - some toddler and booster car seats aren't comfortable to sleep in, but if you mostly do short trips, that shouldn't be a big deal. Comfort is my priority, and each child is different.