I really value GPS in my cars and on my bikes. On the ST1100 I am trading in for the Wing, I have a Tomtom Rider (Version1) and I listen to the voice prompts via custom ear plugs with built in speakers. These are pretty comfortable and fit far better inside a helmet than any speaker system I have tried, although my BMW flip-up actually has a ton of room for speakers compared with any other helmet I have tried, including the Schuberth – which was supposed to be pretty much the same as the BMW helmet, which Schuberth make.
What is bugging me are the very unflattering reports on the built-in SatNav on the 2007 Wing and it looks as if a Garmin Zumo 550 might be a good thing to get. I shall hold off until I have tried the built-in unit but I am not hopeful after getting used to the facilities offered by the Tomtom. I should be able to use my existing headset for the Tomtom with a Zumo, though I am not certain.