Hello Northwind,
Coincidence or what! I also just retired my Original Yuasa tonight - over 6 Yrs old & 31K miles. Granted I was keeping it going with a weekly charge but great service from a battery. I just felt with winter coming in that I was justified to get a new one that would give me a bit more re-assurance.
I bought a Yuasa from Mad Matts Motorcycles:
http://www.madmattsmotorcycles.com/
Good service and prompt delivery if you want a recommendation.
George