plates?

gonna replace my clutch as it does not feel tops at top end. Been looking about and I have no way on this earth getting my wife to ay yes to a barnett kit so been looking for my trusty EBC ones. found a set of friction plates for £57. is that good? Also what springs should I get, Thought I read...

I'm not planning the put the bad ones back however what would happen if you took the plates out for inspection and they were good and you put them back in a mixed order. Would they be okay? I know this might be a stupid question but I need that raffle air filter so bad! I mean I need to know the...