I am rather new to cycling, and have an older Univega Alpina Country that I won in a contest about 12 years ago. I think that particular model was at the time considered a hybrid bike with the crowbar handlebars and the knobby tires. I am wondering if I could reasonably turn this into a road bike by replacing the knobby tires with road tires and replacing the handlebars with the curved road bars, brake/shifter combination, etc. Would it be cost-effective to do so? I just recently bought a Trek 4500 to accomodate the all-around riding that I am presently doing, but want something specifically for road use and faster speeds than the Trek I have. Thanks in advance for any advice!