Well, you first need to determine your price range. I just did my first build and it was definitely budgeted for sure. I thought I could get it done for under 2 bills, which is still somewhat doable if you have extra parts from a previous build or buy used or have connections. I got all my stuff from a mechanic that he had on his bike for less than a month, and needless to say, it was extremely discounted. While I built my Nishiki on a tight budget, it didnt quite turn out to be tight in the end. I spent well over 4 bills with powder coat, and everything else needed to completely build my bike like brand new.

Component wise, it just depends on what you want. I learned that keeping a bike as original and classic as possible will make it worth more to a buyer. Classic or custom, its your ride, do whatever you please. Nitto makes great products such as handlebars and stems. I really like my setup with a Nitto stem, Sugino crankset, Shimano BB, Soma saddle, Tange headset, etc. I am also running a Tektro front break which I love.