Oh, how I wish... Maybe with a nice light carbon fiber shell and a perfectly reasonable weight of 10 pounds, with a LATCH limit of 55, which would be more than adequate for any average-sized harnessed kid...
From what I hear, though, the Safecell and the rip stitch tether make the Britax pretty amazing, and Click Tight is so so easy to install, and you can use it LATCHed later in booster mode.
(Didn't see your second post, yes, the Foonf should last your kiddo as long as she needs to be harnessed, I'd think, and, who knows what's the deal withe EU LATCH limits, maybe their government has more power over the car makers, rather than vice versa as we have it here? But if you read the copy for the SuperLATCH, you'd be sure it can be used to 80, so maybe the Advansafix has the same marketers...)