I had a Cannondale Jekyll stolen a couple weeks ago and am now shopping for a new bike. I'm looking online and the obvious problem is that you can' do a test ride. Honestly I'm not sure what frame size I had. I saw it in a local shop, liked it and bought it. I'm currently looking at a Cannondale Scalpel 1000. I am 6' and weigh 190lbs. Would you suggest a large or medium frame? Thanks for the help.