Thanks again.

So what you're saying is, I probably need to replace the entire crankset and not just the crank arms. And even then, 180's are going to be tough to find - at least in a fixed/ss design (that's kind of what I'm running into). Since I'm looking to go cheapest to more expensive, I think I will throw on a 16t or 17t ACS Claws or some other cheap freewheel first. Then maybe get the same crankset in 175mm if I like the gearing. Not ideal, but I don't think I have much choice without the process getting expensive and basically guessing at what would feel good.