I want to thank everyone for their responses here!

You guys have all given me some good advice, both the pro's and cons.

I think in the end, I will look for either a frame to build-up, or a complete bike. Honestly, a build-up sounds intriguing, and it is something I would like to try, but whichever dream machine comes along first at the right price with the right components will likely be the deciding factor. I know that probably sounds abit wishy-washy, but thats likely how I will decide. I just want a nice, vintage Italian bike that is nice to ride, nice to show, and won't cost me a months mortgage!