I'm going to wait for the (hopefully) forthcoming EU replacement program simply due to aesthetics and consistency. The US counterparts will not have the BBFC "PG" certification logo imprinted on each disc and will differ visually from the rest of the set in at least that way - I know - I'm just weird like that. Also, I suspect the US discs boot directly to the CBS ident as opposed to the static language selection screen on the UK versions.
Of course, this is all academic for me as I've ripped the episodes uncompressed for instant access on my media player! Still, I want all my discs to be "the same"!