Allen, most low carb protein powders are sweetened with splenda or ACEK / nutrasweet. They'll have around 2-5g of carbs and you can definitely add berries to them. Some medium carb shakes are made with fructose - not the greatest sweetener around, but they do taste a hell of a lot better.

10-15g of glutamine would do you just fine. I am running with 140 lbs of LBM and this is what I take daily, and it does the job.

The 20 MAS sure makes cardio feel different - I used to work out for 45 minutes at a moderate intensity and think I was getting a good workout! Boy was I ever mistaken. Those intervals sure do get you sweating.

Have fun!
N