I'd suggest trying to break up all that golden color. The yellow wall paint looks nice with it but it's a little too monotoned. A sage green would look nice with the wood.

(Also get some new cabinet knobs, it will really update it. And maybe a rug/runner to give some contrast between the flooring and cabinets)

I think you can head into the realm of grey if you wanted to get a color that's more up to date. Here's a good example of grey used with golden oak cabinets. Read through the questions for the photo and you'll see that they they used a custom blend of a couple of colors to achieve this shade. You are wise to remove the valance and new hardware would go a long way. Everyone seems to hate golden oak today, but I really don't think it's so bad, especially if you don't have the arched doors on the uppers.

Sage green would like really nice with that wood.

I think the gold tone yellow could be interesting. Kind of depends on the color of the other rooms that connect to kitchen and what colors you like.

I personally am not a green fan. Google images has some nice ideas. Paint color is really a personal preference.

https://www.google.com/search?q=wall+color+for+oak+kitchen+cabinets&rlz=1C1CHZL_enUS746US746&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjs_bfVnJrYAhVq2IMKHabkBokQsAQIZw

I have similar color cabinets and I have a light creamy beige - just enough color to set off my white trim. There are many possibilities. Cool grays and warm wood tones do not do anything for each other, but a green, blue or white with a gray undertone can work if you like those colors.

My kitchen is in my "my pics" idea book.

Kevin, that room makes me swoon!!! It is drop dead gorgeous!! Thank you!