Everyone I know - friends/family calls me a "foodie." I don't know what a foodie is, so I'd never call myself one.
OP - using your terms, I have a champagne budget, but I almost always choose fantastic beer over crappy champagne.
WDW has a lot of overpriced champagne, and in general, it's not particularly outstanding for that price, so I generally stick to good values that I've found.
Flame Tree's spares - if you like smoked spares. Decent value for the quality.
Kimonos for sushi. It's not overpriced for standard, basic, sashimi or nigiri. If you are into hipster mayo-maki rolls, then you'll pay accordingly.
Teppan Edo is not too horribly overpriced. It's not great teppanyaki, but it's not bad for the wdw premium, and you'll get a few laughs.
I'm absolutely sure there are other valid opinions on some good places for a decent price. I just take all opinions with a grain of salt - been burned before. I found Pecos Bill's fajita platter to be inedibly salty for my tastes. Threw it all away, and the fixin's bar was pretty low grade. Lots of people scream about that place being fantastic for QS - conversely, plenty of ppl love Columbia Harbor House, and I think it's pretty decent, too. Just sayin' opinions can be all over the map. I'd bet if you research a few of the wdw food review sites or blogs, you can come up with a shortlist, and then ask specific questions about the food from there.
My normal approach is to research a lot, but not expect too much, to be pleasantly surprised. I usually stay away from "b-side" ethnic foods for the most part, since, it's gonna be Disneyfied. No way around that. Hope that makes sense, I tend to ramble.
For a "foodie" (I guess) surprise - Search for Hummus fries at Epcot - GET THEM without hesitation if they are still offered at a booth somewhere, or inside the Morroccan Pavillion. Surprisingly crunchy outside, with a creamy middle, and the topping was a refreshing contrast of cucumber and yogurt (obviously a play on what most ppl would think of tzatziki) with a very good hit of chile pepper. Spicier than you'd think WDW would make it for the masses. I'd be happy with two orders of this as a meal for myself.
Disney Food Blog, and disunplugged, are two vlogs that I enjoy for funny opinions on things like this. Allears.net and TouringPlans bothe have decent lists on their websites as well. Plenty of sites have done research for you. You'll find em!