Get both, but not those two.

I picked up a rideable but scruffy 1978 Colnago Super for ~$350.00 in November '11 and a 1974 Paramount that is a Cycle Art repaint and very clean for ~$750.00 this month. So for less than either one of those frames I can choose my ride on any given day. By my choice, not necessity I will be bringing the Colnago back to full Campy spec from the current mix and match and the Paramount will get high flange wheels and the correct rear derailleur at some point.

Keep looking and you will find the right bike. Both of the above were CL finds. Not sure why the Colnago languished as it was within the price point for the market (Orange County, CA). The Paramount was over the "magic" price point for its' market (Raleigh) and was relisted after ~10 days and that's when I could no longer resist.

I would and will ride either of them on Century's, Gran Fondo's, and other such rides.