Hi mate - and welcome. Might see you around Newcastle sometime, ive got a modified white Mk6 GTI.

For tuning the 1.8T 20 valve engine, it seems you would be crazy to use anyone other than Gavin from Custom Code. Just about every man and his dog on this forum with that engine is tuned with Custom Code. Gavin is a member on this forum.

As for suspension, personally im not into buying used performance suspension as you never quite know what you are getting. I would prefer to pay a little more and buy new.....but each to their own.