jeffohray,
to the Sprint forum of TriumphRat.net.
I own an '04 Sprint 955 ST myself so I can answer questions pertaining to that accurately.
You may by your own research have found that there was a model revision in '02 where several changes were made to solve some minor niggles and improve a few things, then in '05 the new 1050 Sprint came out with a brand new frame and the same suspension and brake package, now ABS is available on the 1050 Sprint.
The '02 to '04 955 Sprint ST or RS 955 engined models are well proven with time and many miles that they are pretty bullet proof and an under stressed high performance engine delivering an almost perfect torque curve (actually a 45 degree line).
The 1050 engine is a longer stroking 955 and is proving to be as reliable as the 955.
As for seating I carry my wife frequently on my '04 and we found the stock seat had her sliding forwards on steep downhill twisties and hard braking.
I have the Triumph Gel seat and we both like it very much.
Unfortunately seat questions are very subjective as what suits me and my wife isn't what will necessarily suit you and yours.
The 1050 seat from '05 onwards is more stepped and has the pillion higher than the previous 955 model range and the styling of the 1050's is more sporty in appearance also with sharp angular lines as opposed to the classic curves of the 955's.
I have pics of mine in the albums in the clicky links below.
cheers,
DaveM
