Low carb PWO shake for leaning out...no whey?

Sorry if this has been answered 101 times. I did a general search and found somethings SORT of similar but not totally the same question so...here I go...
5'3, 183lbs started paleo 6 weeks ago and I'm down about 16lbs without being TOO strict so I set a goal for myself to try to be more disciplined (i.e. just because its 'paleo' (meat and its not breaded) doesn't make it good for you!) and see how much I can lose in the next 4 weeks with more diligence. I've definitely got a LOT of fat to lost still so that is my focus. I do exercise though- grok workouts and a lot of body weight movement stuff like Gillian Michaels 30 Day Shred (yea yea I know) and I also commute via bike (move slowly a lot/play) around Toronto, but I have dropped my "chronic cardio" habits.
I'm going back through old Robb Wolf podcasts and in Episode 9 (about 29min mark) Rob says not to use whey protein for a post work out meal if you're trying to lean out because it causes more of an insulin spike. He didn't say what to use in place and that is what I'm searching for now. I really enjoy the whey protein shake with spinach & blueberries because it's convenient and easy to stomach right away after the workout in the AM. I'm thinking maybe I'd try to switch to egg white powder and make it with coconut milk to add some good fats in...am I on the right track or can anyone give me any more input for this? Or perhaps link me to this topic if it has already been discussed to death?
Much appreciated!
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~Cori
Started Paleo 2/6/12