I have / am using a Signo G2.
I am very happy with it. One thing to point out is the adjustable head restraint... the taller they get (which seems to be every other day) all you have to do is move the lateral supports up with them. It's good for up to 8 yoa or 50 inches and 70 lbs. This was the first seat I got after the mandated 'rearward facing' cradle seat... and it is the best seat I found after many many hours of exhaustive research.
One of the most notable thing's about Recaro baby seats... is that they actually sled test them. That may not seem to be a big deal now-a-days... but they have been sled testing them since they got into the kid seat business... and everyone else has followed them.
I ordered mine from safechildseats.com