Thanks everyone for you comments and suggestions Lol to be honest, it's more my wife not liking the ride, if I can find a solution to the problem I'm sure I'll be able to keep the car forever... ...if not I'll just have to get rid of the wife ???
I've been in contact with a lot of coilover manufactures and they have informed me to stay with the stock setup, because 99% of all coilovers normally give a firmer ride over stock... ...in general. I've also been in touch with subispeed in the U.S, who work on the latest WRX and STI and they think the WRX suspension will fit directly onto the STI. This could be an option, as the WRX is apparently a much more comfortable daily driver. I've also spoken to Subaru uk who maybe able to order it in and fit it and keep the warranty in tact. ?