Now logically can someone tell me why I can't at least play an offline game with my buddy on my couch?
Because you'd be [censored]ing about how the game looks while in splitscreen-mode, then.
Games upgrade thier material and graphics all the time. A console's capabilites stay the same. Once you hit the spot where you simply can't upgrade the game due to the console holding it back, it's not the developer's fault for making bad stuff, its the console's fault for holding them back.
And that spot was reached about a year or two ago already.
I am on a 64 bit Windows 7 OS, yes and I guess the main question I would have would I get more of an experience using the PC game or the console game? Is Medium/High on the computer comparable to the console version of the game?
Just trying to get the best bang for my buck.
Playing games on a 600€ PC from 2009 will allow you to get more out of the graphics than on a console.
On 1280x720 (which is just a bit over console resolution) you'd be able to activate Anisotrophic Filtering (4x-16x) and perhaps Anti-Aliasing (2x, 4x) plus better textures and an overall sharper image.