Hey Ledd, it is important to have whey and dextrose after training. And Optimum Nutrition 100% Whey is probably the best combo of flavor and value.
I use the vanilla and tropical punch flavors, as these are the best tasting with Powerade or Gatorade, or with water first thing in the morning.
Post workout, I like 2 scoops of tropical punch whey and 3 scoops of mountain berry powerade in a shaker, and I add water in the gym. Also the vanilla whey with tropical punch powerade is very good too. They both tatse like fruit smoothies.
A spermarket chain here in Columbus, Krogers, has powdered Powerade on sale for $2.99 a tub about once a month, and I buy a couple of both flavors. Each tub will have about 11 srvings of 3 scoops, which has 54 grams of sugar, mostly dextrose. And it costs less than 30 cents per shake, so that's what I use. You can use Gatorade, or maybe even Kool-Aid. I guess bulk food stores usually sell 2lb or bags of dextrose powder, but I like the taste combos that I use, and it's not that expensive.
ON 100% whey can be bought online for somewher between $25-$30 online for 5lb jugs, so it is much more economical to use a shaker, and make your own post- workout shakes.