Replaced the battery on my 1250 last week. I did consider a Shido as they're light and relatively cheap.
In the end I decided against it for a number of reasons, the main one being that (currently) the bike sits outside and is used all year. The ability to start in freezing temperatures concerned me.
In the end I opted for a Yuasa GYZ16H - spins it over much quicker.
The Shido weight saving is around 1% of the total weight with this rider and gear on board.