Whey + a fast acting carb is all you need. I've used dextrose in the past, some use maltodextrin.
Lately I've been using waxy maize starch, then whey with a small amount of dextrose 15 minutes later. Alot of people on some of the other forums have been praising the waxy maize starch - it's the stuff in Vitargo. You can buy it in bulk for much cheaper. PM me if you are interested in where to order, since I don't think it's allowed to post the site here.
There is nothing special about Proglycosyn, and I could give a shit if Ronnie Coleman uses it or not. As you can see, it's whey isolate + dextrose, with a few extras - l-glutamine and creatine. The debate over the usefulness of L-glutamine has been beaten into the ground, but I think it's safe to say that it's no longer supported like it once was. Glutamine peptides are the thing now, apparantly - just look at all of the supporters of G-covery. Also, many will tell you that creatine monohydrate is a waste and that CEE (creatine ethyl ester) is the way to go.
I won't tell you what you should or shouldn't use, but I think you should be aware that you can find quality whey isolates very reasonably priced, and dextrose is dirt cheap. The fact that SNAC charges $52 for 20 servings of Proglycosyn is completely absurd.
BTW, dgee, have any of your 3 posts been about something other than Proglycosyn? Just wondering...