You're super tall and therefore probably heavy for a cyclist so you're a bit screwed as far as bike weight, however extra weight should affect someone like you way less than someone like me for example. If I were you I'd be looking for an aluminum frame since it will be stiffer and lighter than your steel frame. Another good option (more ideal for smaller riders for sure) is converting a decent vintage road bike. A lot of these bikes weigh 23lbs stock and it's not difficult at all to build a sub 20lb fixie from one, that will also have good handling and speed on the road versus a pure track bike that for some reason hipsters like to use outside of the track (which I would not suggest).

Also I have to mention the nashbar frame which is really cheap and ligher than most things. You can get a 380g uncut carbon fork from pedalforce on amazon for $99 shipped also. If you can't build a sub 20lb bike out of that frameset you fail. Lastly use a road bike front wheel and quick release instead of a track wheel and save like 1lb.