Don't worry too much about the crankset. You likely won't be able to tell the difference between a cheapish one and an expensive one.

Spend most of your money on a nice wheelset and then you can cheap out on everything else and upgrade later if you're unsatisfied.

Most important stuff are wheels, tires, control surfaces (seat, grips). I'd spring for a nice EAI cog as they aren't much more than a cheap one. KMC Kool chain is like $15. No matter what your crankset a decent cog and chainring and a smooth chain will make the drivetrain feel nice.

You can cheap out on things like headset, seatpost, stem, bars etc as long as you get the fit right.