Didn't quite understand the OP properly, but I assume you intend on taking whey after rides. As someone else said Optimum Nutrition is generally regarded as the best whey protein on the market, however it's twice the price of anything locally produced, and I don't think it's worth it. When you finish a ride you need whey protein to begin repairing your muscles, but you also need to restock your glycogen stores with some carbs. So It's not really an issue if you get a "meal replacement" which has a bunch of carbs in it anyway, because your body needs them. If you do want to go for a pure whey, really the quality boils down to the quantity of Whey Isolates versus quantity of Whey Concentrates. Whey Isolates have a higher biological value and therefore your body can synthesise the protein faster and begin muscle repair quicker, but whey isolates are a lot more expensive to produce... Anyway long story short, when looking at a protein on the shelf, if you look at the ingredient list, and whey isolate is listed before whey concentrate then you have yourself a pretty quality protein. (A lot of companies advertise whey isolate in their proteins, and then only like 5% is isolates, so if you check the order in the ingredient list you can avoid being hoodwinked). You can also compare amino acid profiles of your different proteins, your BCAA's (Branch Chain Amino Acids) are the really important ones, which are Leucine, Isoleucine & Valine. Also glutamine is an important essential amino acid. So basically a high quality protein will have a greater quantity of these per 100g than a low quality protein.
