I actually have two questions. 1. What is the difference between these two? This and This They are the same model yet one costs more than the other. The first says "B stock" Not sure what that means, maybe someone could enlighten me. 2. I am almost ready to purchase a new amp. I've read reviews on both but i'm not sure which one is worth my money, I'm looking for this amp to last me the next 4 years in college and the Ampeg is what sticks in my mind as far as quality and durability, not sure about the GK, but I do like that its so small and so loud and I have heard it used at gigs and that little thing is LOUD. Any help? I am deciding between one of the two Ampegs and the following amp: This one Your help is greatly appreciated TB.