Hi bud and welcome to the site.
Look in the warranty section for the usual issues, there arent very many and all are well documented.
The differences between UK, JDM cars are listed.
As for UK cars there are a few upgrades over the years but basically its down to a base model or a GT spec.
All depends on budget and which of the oprions you need. Dont expect dealers to have a great knowledge on these cars.
Any specific questions then post them up. They are great though
Probaby a bit quiet tonight as we have a big meet this weekend