After a year of no biking (running, hiking or climbing) due to a back injury, I've finally decided I need to consider a flat bar road bike. After test riding numerous, I'm down to two very different bikes that I like the geometry on: Cannondale Road Warrior 1 and Marin Lucas Valley. The comfort level is a close call. My current bike is a '98 Cannondale, so that brand is tried and true. Any suggestions/advice?