Interesting how 3-6-0 (TSO) was a naming idea from the beginning.
Other than MPAC (read as impact), can't see any of those other names really working. Glad they stuck with Xbox. As a product name, it just works.
VIC & VIP are too close to VIS, which was a Radio Shack/Tandy product.
http://youtu.be/y73XriwHJxQ
Watching this, it's interesting to see how far back (1992) Microsoft was trying to make inroads into the living room. Basically a Windows 3.1-based computer with its own UI and keyboard-less interface.