turkey9186, Basically you have a blank canvas, do with it as you wish.

Updating an old SR or ST is easy enough to do, there really is only one problem area, the plastic top tube cable housing guides become fragile with age. I'm not aware of anymore OEM replacements except from perhaps s long time Cannondale LBS. Shapeway has some replacements that I've tested for a couple of years that work well.
[MENTION=170517]rccardr[/MENTION] has considerable experience with the STs, search for some of his posts.

Brad