Thanks for the reply KG Jag. I would love to get some ear time with some if not all of these to really pick out the one that works best for me, unfortunately I don't know of any place around where I live where I could audition any of these. I also understand having a variety of headsets would be ideal, and in this case per your recommendation the 2000's and the 598's but at the moment I am really looking at getting just one set. I am still looking and open to any ideas or suggestions that anyone has.
If you can't listen to them, the next best thing is to find and read some of the professional and experienced user reviews on each of them that you can find here, at Inner Fidelity and elsewhere. Of course posts from Head-Fi folks on this forum are generally very helpful.
In the end you'll pick one after doing your due diligence.