RSMat's 3 door is probably a good YB example, not sure on the lifespan of his turbo but its probably right up there.
I made mine so it was the ultimate drive/ reliability... The turbo has lasted a year with plenty of spanking and is still like new... 400bhp is plenty for proper driving down the twisties... But I may feel the need for a bit more once I've fitted a proper beam ect.... But ATM on the standard beam I'm pushing to the limit .