Well this is just crazy. I finally went with auto-detect; which defaults to Max; just to confirm that I could not run it at this level, and things pretty much look similar to High and the game ran fine. I have a fairly mediocre system and assumed that I would need a Graphics card upgrade at a minimum and probably need to double my Ram, but I think I may be fine as is.

Specs

Duo 2.4 E6600 4 MB cache
2 Megs Ram
GeForce 7900 GTX 512 MB
XP