Most of the inexpensive fixed gear wheelsets that you'll see are marketed to the fixie-fad customer and leave more than a little to be desired for FG road riding in terms of weight, build quality and durability.

I can recommend the Wabi wheels that my LD/FG riding partner has used for several seasons with good results.
A powerful ex-trackie putting in long miles at pace on our rough chip-seal roads tests components well, these pass:

Wabi Standard 700C fixed gear wheel set:

https://wabicycles.com/collections/c...speed-wheelset

If you have a good QR front, which is what I use on my FG, you only need the rear wheel.

-Bandera