Stock or Custom
Buy stock complete bike, if poss new old stock complete bike with similar quality components, I have just done this in the UK with a Bob Jackson frame and an 07my Dawes Giro 500 (Shimano Tiagra triple flightdeck compatible etc) which I stripped and rebuilt on the new frame; all new components and if you choose donor wisely all parts will transfer with no probs, having said that be mindful of frame sizes as I bought a small frame and cables were too short also I suspect handelbars are slightly narrower but I couldn't have bought the components new for what I paid for the whole bike. Also...... now have the unused frame to sell and recoup some of the cost that way. Have fun!