Take a look at the "Where'd you Ride Today?" thread.
http://www.bikeforums.net/classic-vi...-improved.html
You'll find a lot of people who ride their vintage bikes regularly. (or vintage bikes with newer components, or newer bikes with vintage components)
It all comes down to who you are, what kind of riding you do, and what you want in a bike. We can all give you our opinions but none of us know what you want better than you do. As someone who has been riding regularly since the middle of the last century I assure you that there will be ample opportunity in your life to get rid of one bike and replace it with a different one, or even splurge on a second bike!
Enjoy the ride!
Brent