We have a Cybex Sirona and we are upgrading our car with the impending arrival of DC2. Problem is that none of the cars we want to look at and test drive are listed as compatible on the Cybex website! Seems daft to make a £20k+ purchase based on the car seat we own, but car seat was expensive too and we're only used it for a week since we bought it (bought when on hols in UK for the hire car a year ago and stored at PIL, currently re-immigrating from OS).
Assuming we would be stupid to use a car seat which states it isn't compatible in the car we buy? We take car seat safety v seriously so appreciate we may have to swallow the original cost of the car seat...