Lol, well, after looking at those pictures, it all makes sense now.
I appreciate everyone's opinion on this matter. I think my Uncle Oscar, or better known by his celebrity name: Alex, may have jumped the gun on this issue. I told him in our first conversation of the day that I was in the process of contacting Tiger Direct for a return number to get my 663 that I ordered. I believe the problem was, and what eventually led to this post, was I told him about the fact that I did a quick Google search to see what people's opinions were on the differences between these receivers and never came up with a definitive/detailed answer. I was just looking in all the wrong places. Of course, my mistake, why didn't I consult this website? Gene's article, posted in the beginning of this thread would have been exactly what I was looking for. By the end of the day and 3 phone conversations later, it was burned in his mind that I was never going to release this 665 out of my kung fu grip and that I was fighting his advise like a 15 year old wanting a tongue ring

Boy you should have heard his tone, I think I was getting underneath his skin.
Nevertheless, this wonderful thread was created and I hope everyone will rest easy tonight knowing that I am returning the 665. Unfortunately, Tiger Direct's business hours are Monday-Friday so I'll have to wait another day before contacting anybody to get a return number or to evensee if they have the 663.