sosodav

go to track day is good fun!but check your insurance doc before u do! a lot of ins company they don't cover it!if u crush your car you are forked!
suspension wise go for big brand like eilbach  or bilstein !cheap stuff always have some problem!change both don't just using the lower springs use upgrade damper is well!
or go for coilover they control the body roll very well but sometime can be too hard(firm) for the public road driving!
don't forget change to the upgrade bushes is well!(the best is change both front and back)but could be cost you a lot money(because take the whole rear sub frame out is a lot of work can easily cost you £300-400just fit the bushes at the back end) !a lot of people just change the front set of bushes !)
look for the forum for your car they alway helpful and friendly they will tell you what the best brand or product for your car and you can go to local meeting see more peoples is good fun!