Not sure why you would want to avoid protein isolate entirely. As an athlete it can be hard to get your daily recommended levels. You can get soy based protein isolate so it doesn't need to be whey. One tip: if it is whey be careful about the chloresterol levels. I did a blog on this at http://triduffer.wordpress.com/2009/01/27/protein-powder-check-the-... when I found that mine was 14% chloresterol.