I am after a bit of advice about what equipment I should to fit to a bike frame I am having made. I am having quite a classic Reynolds 531 frame (road bike) made. I will of course have to equip the frame, but I was wondering if any of you chaps have any advice on what I should fit. For example at the moment I am thinking Shimano Ultegra. But how much better is DuraAce and what is 105 like in comparison? There is also the other manufacturers, eg Campagnolo. Any advice would be much appreciated.

Ben