I am looking for a seat we can put in DH's car for the occasional trip the boys take in that car (maybe 1-2 times/month). If all four of us are traveling together, we just take my car, so I only need one.
DS1 is 3.5, still rear facing, and pretty darn small. 28 pounds, not sure on the height, but that won't be an important restriction (just because he's nowhere near the height requirement for most seats).
DS2 is almost 1, I'd guess 24ish pounds.

So I'm looking for a seat that's really easy to adjust for height, that I could quickly switch for whichever boy is traveling, and isn't too expensive since it isn't used extensively.

Eventually I'll need to switch DS1 to forward facing, so if it's easy to switch between ff and rf, that's a great bonus, too!

Suggestions?