K.C.
Eddie Bauer has consistently had a very poor reputation with their baby items. I wouldn't recommend that brand. You can't go wrong with a Britax - they are rated number one in safety and parent convenience. I have a Roundabout and LOVE IT.
www.carseatdata.org will let you know how certain carseats will fit in your particular car.
The book "Baby Bargains" unbiasedly rates (on a A-D scale) all baby item brands and lets you know what you should be considering. They then give you a list of which particular items they would recommend. It is a must-have book for all parents. I have followed their advice many times and never regretted it. There is also a "Toddler Bargains" book. Good luck!