Depends on what you define your specific needs. Also, could we please drop this whole "pro/professional" term that Apple has infected us with? I've been working in the entertainment/post-production industry for the better part of a quarter of a century without ever even contemplating about needing a job outside of it. Compared to most of my peers I do pretty well financially, and yet the idea of spending as much on a new computer as a car makes me pretty nervous (a car will last me a good 8-10 years and perform exactly what I need it to do. A computer? I don't think so).
In 2006, going with Xeon CPU's made sense because there really wasn't anything comparable on the market if you wanted multi-core and dual CPU's. Nowadays, an i9 X-series can be had for less than $1000 and it supports 4-channel DDR4 RAM up to 128Gb and up to 44 PCI lanes which is plenty for the majority of high-end users.
Linus Tech Tips specced out an exact same system as the base Mac Pro and it added up to $3160
Is the fugly (sorry apologists...praise Apple for their laptop designs, iPhones, even the Mac mini is pretty sitting on a desk...but this thing is bigly fugly and you know it) cheese grater enclosure really worth almost $3k?!?
Lastly, does it strike anyone else as weirdly ironic that we're having this debate on this particular web site?