That's great with the decals I've got a couple of sets off ebay until they are on I have no idea what they will be like I may be in touch with you if mine look not to standard,
Basically you probably have 2 of the most original silver SR's in the UK! Maybe keep using your black one for longer and keep them tucked up and when the day comes to retire it you have a choice then keep the black for spares, I've also got a gt interior and a 98spec and the gts are much more hugging they are so comfortable arnt they it's a tough one as your seats are in mint condition but as you know the gt seats transform the ride but the 98s are on custom subframes so sit lower that standard ep91s I got them off a active member on here good group of lads still around