to be honest mate
ive had a Preston x6 seat box and never had a problem with it till this year when it started to fall apart in the odd area , nothing to serious
it had been hammered out every single week for 3 years .
id have had another , just fancied a change
as for the new modular ones the diawa one was the best one i found that i liked and suited my needs ,
go to a big store that stocks them try them out and then shop around for the best deal
iam sure if they want your biz they will match or better other prices ?
i got mine from fosters of Birmingham , the Internet is a wonderful thing !!