SDA store is one run by Seventh Day Adventists - most of them are vegetarians, so their grocery store has lots of cool stuff in there.
As for brand, the fake hamburger meat I used to use the most is the frozen stuff in a bag from Morningstar farms (good to use in spaghetti or chili or even Hamburger Helper). But I've got a ton of the Worthington stuff in cans and it works just as well for about the same cost without taking up space in the freezer, so that's what we've been using the most recently.
The fake chicken I use in the cans is from Loma Linda. But, the best stuff is the chicken nuggets in the freezer section from Morningstar Farms.
I use a LOT of wheat gluten in place of chicken in recipes, and I've never had a complaint from a carnivore, they like it too. Cost wise, that's the best for prepping. It's under two dollars a can, and is enough meat substitute for two adults and a little one for a meal.
As for our trip today, we got lots of canned veggies and fruits, they weren't THAT much cheaper than the grocery store, but being able to buy them by the case is just easier to get that much - and since we bought so much, that nickel or so a can difference added up. We also got Bisquick and two HUGE boxes of dried milk and pancake syrup and salad dressing and mayonaise and some spice mixes and a bunch of other stuff. Oh, and Caillou softwear and a four foot tall teddy bear for the little one - couldn't resist.
So, once we get some more dogfood (from Petsmart, the only place in town that carries the brand we use), and hit the SDA store tomorrow for more fake meat in a can stuff... I think we'll be back to being fully prepped. We've probably got four dozen cans of various fake meat under there, but I'd like to get another case of gluten and another case of fake hamburger just to top us off.
Oh, bleach.. gotta hit the dollar store up.