I have a 586 and it is the nicest riding frame set I have ever owned (Cervelo, Storck etc). I'd like to give a 695 a try to feel the difference between models. But I'm afraid if I did that I would want to get one after the ride

Here's one of the cheapest places to get a new Look 695 (other than ebay):
http://www.bellatisport.com/look.html