Gold has been the kiss of framing death in recent years, especially for photography. I would suggest you avoid it. Unless you are presenting master-level paintings of floral arrangements or pink-toned, Renoir-esque nudes. I won't make specific recommendations because framing taste has a lot of regional variation. Here in New Mexico 3 to 5 inch wide bronze moulding sells pretty well on medium level art, although you do find some very fancy compo and even hand carved and gilded gold frames around some very expensive pieces in the best galleries.
As a general caveat about all moulding, never buy anything without seeing a current sample. You should request a "chip" rather than a corner sample. A chip is just 3" of moulding cut straight across from the end of a stick. Corner samples tend to be made from stock from several manufacturing runs in the past, while chips are usually cut from current stock and will lead to fewer surprises than outdated corner samples.
You must very carefully vet your poly choices because about 98% of poly comes with a plastic gloss finish and cheesy patterns that just scream plastic, but there are a very few nice ones with very natural looking finishes, for instance from Garrett Moulding. Spend a day wandering through your local galleries and take lots of notes not just about frames, but also about surface finishes, reflection issues, placement issues, sizes, and everything that strikes you as significant. That will help you to later see your own work more objectively. Tuesdays are a good day for such gallery crawling as not much will be going on and the bored sales people may be happy to chat about what does and doesn't sell. Their incomes depend on those sales, and they will have strong opinions.
For maybe 10 years the hands-down favorite moulding color has been 1 to 2 inch wide matte black. How sad is that? But true.
Don't think I don't like gold frames. If my price point were in five figures, I might be using
these. But only on Canyon Road just off the old Santa Fe Trail.