I've done a search and can only find one member with a GA-2000 5A; anyone else have a 5A or 3A? I am thinking about getting one of the GA-2000s and am favoring the 3A or 5A, although I must admit the 1A9 is attractive. Something tells me I'll be happier in the end with either the 3A or 5A. I'm intrigued by the light weight; I suspect it is quite comfortable. (Yes, I did read the review of the 1A9.)