Wow!! Thanks for all the responses, guys! I would have never thought to get so many informative opinions in a short amount of time.
All I had to go by was knowing the D&S has the high line through Animas and that the CATS seemed to have a much better website, lol. That and looking through all the NG books I own.
It looks like you've gotten me swayed towards the CATS. I am a RAILFAN not a tourist, and while I totally understand that not many tourist operations can allow people meandering all over, the ability for one to do so, is a big plus in my eyes.
I showed my wife the responses and she summed it up best "Thom, come on, you know you are going to want to wonder all over the place, and if the one railroad won't let you, you'll be pissed off." LOL, she knows me well.
Tanglefoot curve and Cumbres pass, here I come!
Thanks!!