Seamuis makes a good point.

My hands like the Zipp Service Course SL-70 Ergo bars because of the flat top section and the compact drop but for some people that doesn't work for them. The Nitto STI bars also are quite nice if you need say a 26.0 because they are a more modern bar but in a more classic size that fits some quill stems (and it was silver/grey rather than black). Matching cockpits are all well and good but comfort is important, my Ti road bike is Ritchey stem and seatpost but I went with my favorite bars for comfort. The cockpit on my Phil Wood is a Thomson seatpost, a Cinelli quill stem and the Nitto bars again for comfort. I might have a matching cockpit on my new Langster only because it unintentionally already is mostly Zipp minus seatpost which I haven't chosen (currently using the old stock one from Langster 1) However again comfort should be number one on the list. I would rather have a heavier non-matching bar that is more comfortable then the opposite.

If you are riding fixed gears I recommend clipless pedals (especially those of the MTB variety for ease of walking) because foot retention is important (slipping off a pedal going downhill isn't fun and I have done it) but if you are going single speed, a good platform pedal is just fine. I do like something with some grip to it so the studded MTB style pedals tend to be a good choice but some footwear might not be ideal for those pedals. However if your riding is mostly flat and you have brakes or are just a little crazy you could go without clipless pedals and ride fixed, people do it.