What about those kits that contain the meals and dehydrated fruits and veggies? Do they taste awful?
Dehydrated fruits and vegetables don't tasts as good as fresh food, but it's not bad at all either.
My currrent food storage is primarily things I catch on sale, things I self can and preserve,...
The fact that you are already home canning means you are ahead of the game.
So what about the bulk ordered stuff? Is it worth it to get it sealed for 20 years?
I tend to think it is simply because you won't have to constantly rotate and replace the storage food. You can run a multi-tier system of food storage too. Keep a bunch of the 20 year storage food in the basement (I like to have a minimum 2 years worth at 3000 calories per day), then also have a minor storage food system that you rotate through and use constantly that lasts maybe 3 months or so. When crisis hits, you have 3 months of food that you are used to before you either need to bust into the serious storage stuff or things return to normal. You could also have an additional fall back food supply that goes in between the short term food storage and the expensive 20 year shelf life food, and that is canned food. Canned food is good for long past the date stamped on the can provided it hasn't been stored out in the attic. You could keep three months worth of food that you rotate through, stored in tupperwear. Once that's gone go to eating out of cans, after that most of the people around you will have starved to death or been shot by you as they try to take your food supply. Important point to emphasize here, food storage doesn't just mean storing food, it also means defending it against people who will kill you to take it.
The source I trust most for long term food storage is an outfit called Walton Feed. They are located in Montpelier, ID.
http://www.waltonfeed.com/ I trust them because they are Mormons who are in business mainly to supply other Mormons. That means their quality control is literally a religious calling to them. I have no reason to doubt other suppliers like Pleasant Hill Grain, but with the Mormons I have no latitude for doubt. It saves money if you buy just the things that are difficult to store yourself like the freeze dried meats, fruits, and vegetables. Those are the most expensive. After that just buy your own 5 gallon buckets from Home Depot, and the rest of the supplies and do-it-yourself for bulk carbohydrates like rice, beans, pasta, wheat, etc. (see the sticky posts at the top of the food storage forums for details on this).