Guys: I've narrowed down my search for a tube practice amp to two (2) Fenders. One has been a Fender mainstay for many years and one is new to the Fender stable. My choice must either be the Pro Junior or Super Champ XD. I've played both. Both have very nice tone, both are 15 watts, both have 10-inch speakers and both are about the same price. The problem is that I don't know enough about the guts of either machine to know which is a better buy! Please give me a hand with this and help me to justify my decision. Thanks.