Jeff,
It basically comes down to one thing: money!!
If the system you originally specced (which will be an awesome system) is very close to your budget, then a Xeon system is probably out of reach (especially with a pro graphics card).
However– if you can snag that Xeon CPU in the link I gave for that sale price, well, that’s a huge WIN!
Nothing wrong with what you originally wanted. It’s equivalent to a BMW M3 if we use cars as an example, where the Xeon gives you a Ferrari 458.
Dave