Ford F3 or 450 quad cab dually(would make most since cus i can throw plow on it) - One of the 2 best you have listed here. You can get for cheap, lots of parts to get easily and not an arm an a leg to keep going.
07 or newer Tahoe - The other one that i would go with because of above reasons.
Hummer H1 wagon - I looked into these, i will get one later in life when i can afford to keep it running. Its hard to get parts for and not alot of people like to work on them.
Audi S or RS6 possibly 8 - Great if you can get a new one, great warranty, but when it runs out, you are shit out of luck.
Merecedes big body...dont know which one yet. - You just wanna look fly you silly little bitch. Unless you get an 07 or newer S63, black with black 22's then you will be gay.