>>1985016If you're planning on spending time on it, I'd say converting an old road bike is the way to go.
This one is in my bedroom, because it's the last one I rode...
I disagree with most of what the other poster said.
You can find old steel road frames much more readily than old steel track frames. The few parts that matter will bolt to either.
Road cranks/rings (130) are dirt common & come in more sizes. 3/32" chain is no problem, and there are plenty of cog options for it.
I like drop bars, so that's what I use. These are comfortable in the drops for long stretches, but I can sit more upright when I'm in traffic.
As you can see I use a front brake (other brake lever is just for a hand rest), flat pedals w/ straps. Just ride in normal shoes.
I built the wheels for it (could be a big expense if that's not an option), and bought a cog, lockring, axle spacers. Everything else was reused road bike parts. Cranks, chain, headset, etc etc, all of it came off a road bike that I wrecked.
Sheldon's page on fixed gear conversion was the best resource when I did it. If there's no shop near you that sells the bits, Retrogression has them.