Re: I'm Absolutely Clueless
I felt the same way! It all seems pretty straightforward now, but with the first baby it was sooo confusing.
I would avoid the Radian for a seat you'll be switching around alot, because they can be a pain to install. (To my experience anyway.) Also, it's heavy.
I've never had a Britax, but I believe they're supposed to be easy to install. The favorite seat of mine that I've owned was a Evenflo Triumph Advanced -- I'm not necessarily recommending that (I think that model isn't even around anymore), but it really opened my eyes to how much easier a carseat can be to install! I loved that thing.
So I would look around for something known to be easy, and also keep an eye on the weight.