Hi K.,
I am a mother of 3 ages 5,4 and 15 mos. For my older kids I really liked the Cosco Alpha Omega. My 15mo old is more petite than they were though, and we're on the go more now, so I felt she needed something she could still rear face in if I wanted her to. She has two carseats that I love. The first is the Graco Safeseat. It is a rear-facing only infant car seat that seats up to 30lbs and 32". It is very convenient when we're out at naptime since I can remove the seat from the base. I purchased it at Target for $129. She also has the Evenflo Triumph that I purchased as her convertable carseat. It seems very comfy & she does fine forward facing, it's just not as convenient for napping. I thought it was $119, but I just looked online and found it for $139 - so I might have hit a sale. :) The Cosco Alpha Omega was a great seat too - my kids used it for over 2 years and it will rear face also. They are on the tall side though and we had to get a high back booster for them by the time they reached booster age. For that reason I decided to get the Evenflo Triumph b/c it looked so much cozier and a better fit for her.
Also, if you wonder if the carseat you choose will fit well in your vehicle, you can go to Babies R Us and pick your carseat, ask an associate if you can fit it in your vehicle. The will take it out for you while you check fit. This way you don't have to buy it, get it home, put it in...only to discover it's not a good match for your car. I'm not sure if other places allow this, but I know Babies R Us did. :)
There are several carseat sites you can go to the Internet to check out ease of use, how it fits in your vehicle, etc. Two good sites I know of are:
www.carseat.org and
http://www.nhtsa.dot.gov/portal/site/nhtsa/menuitem.9f8c7...
Best of luck to you!
C.