Whelp it's been just over 8 months since I posed the question - thought I'd give an update.
I have since purchased a 2008 ST1300A - just under 29k miles, in fantastic shape - it actually belonged to another forum member here boSTon - it arrived in December of 15. I simply adore the motorcycle and truly enjoy riding all distances with it!
Completed a 1k trek to my brother's in Manhattan KS. My local brother with his road king went with me. We stopped midway in Denver on the way there and back. It was frankly amazing. As I came into Manhattan, the temps were up to 106 but I was expecting it, had a camelback filled with icewater sitting in my tank bag and kept me hydrated. I also kept my leather jacket, gloves and full face helmet on the whole time and I do believe it helped protect me from the broiling wind (even though many people thought I was crazy). Spent almost a week in KS touring the local towns with my brothers, eating at unique one-off diners and just soaking in the sites.
I am very, very happy with the ST and I love riding - especially long distances. I did discover that I must get a Russell day long, as I found that I focused too much on shifting positions to keep my bum happy and believe my enjoyment will only increase if I can eliminate that annoying factor.
So thanks again to all that have shared your thoughts on this topic - I very much benefited from it!
I just got back from my ride out to Russell to have my old seat (built in 02 and 200,000+ miles on it) refurbed and another one built fresh. As I told Jay at Russell after a 140 mile test ride -
I've got a bad case of 'Happy Butt'!
I rode back 650 miles day 1, 877 miles day 2, and 750 miles day 3 to get back to the Holler. Still have a 'Happy Butt'. I met the whole crew including the owner. What a great bunch of folks! BTW, they could not remember ever rebuilding one that had that many miles on it. ;-) It was still good but now it is a lot better.
Sorry, just read this... good for you! I love my Russel seat too!