We purchased the Graco Snugride after doing a lot of research.  There are lots of patterns to choose from, and it is very easy to install with or without the base.  The extra base was not too expensive so overall, we got one seat and two bases for under $200.  We also used the Snap n Go stroller with this carseat which is AWESOME.  So easy to use, has a huge basket and is easy to push.  I was sad when my son outgrew this car seat because I had to give up the Snap n Go, too.  You can get a SnugRide with the travel system but that was too bulky for me.  Search around for the pattern you like-there...