Indeed, a topic that's a continual source of interest and debate.
Mentioned before on here that I also changed my starter motor, and yes it is a pig of a job the first time, yet less than 1yr later with a nearly new battery the clicking returned.
Coincidentally spoke to a mate of mine could of nts ago who's had his S1 Aero since new. Conversation was about correct way to fit the centre-lock wheels (another big topic). He did though tell me as an aside that ever since putting a de-humidifier in his garage nearly three years ago he hasn't had a single starter click!
Cheers