Intel(R) Xeon(R) CPU X5675 @ 3.07GHz 3.06 GHz
64-bit Win 7 OS
and two big monitors...
I don't know what any of this means.

I am no where near a computer expert, but I think you have a pretty capable 6 core processor.
Copy and paste this:
Intel Xeon X5675 and use Ctrl + F to find where it is on this list at this website:
http://www.cpubenchmark.net/high_end_cpus.html . This list only includes high end, at least according to the website. Usually costs over $1400 according to this, and Intel's website (I checked).
i hope you were kidding, because that CPU is horrible for the price. I have 3930k which is 6 core and 12 threads. I have it overclocked at 4Ghz. You should be able to get the 3930k for $570 at most. I have built my own computer and helped two of my bros build theirs. If you need help building one I can help.