Not one single other carseat company will get all children (or even most of them) to the limits stated on a particular carseat.
Are you familiar with the built of the RA? The front of my RA opened up at the seam (where the 2 parts of the plastic shell met), I complained because it was a relatively new seat. Although it was not a safety concern (TC was involved at this point) but Britax replaced my carseat without hassle. Since it was in Canada and I said I didn't want to deal w/ shipping across the border, they arranged it with the retailer that I bought the RA from to replace with a new seat.
So please accept that I have big disappointment with SK in this regard as I only have 2 issues with carseats so far in the 8 yrs of having kids - 1 is a lousy service and the other was well.