From my experience, the head tube angle is what can drive the setup of the bike. With the Scalpel and a 69.5 degree head and the Epic and a 70 degree head, you might be able to get an Epic to have a quicker response. Personally, I prefer a steeper head angle for just the reasons that you stated. From my experience, there just isn't a bike that responds quicker than an Epic. My recommendation would be to try out the flat bars at your LBS. They should be able to let you try them out, so you can get a feel for them. Most likely, you will get the feel that you are wanting.
Keep us posted! Your journey is a good one to follow.
Ride it like you stole it!
Vance
Keep us posted! Your journey is a good one to follow.
Ride it like you stole it!
Vance