Receivers?

Here is what we know: Shipley and Cosby are both good, but neither is a scary down-field threat. They are great 2 and 3 receivers, but we really need a big, fast body that can get down the field and keep defenses honest. I've heard that Buckner is looking good, and either he or one of the other young receivers needs to really step it up. Anyone hear anything else about who is looking good? Colt can get it there, but we need some serious weapons to run those 3, 4, and 5-wide looks Texas has been using.