Thanks!

[Complete aside: I don't know what all the acronyms mean. Is there somewhere I can go to find out?
UA - United Airlines?
DL - Delta?
SPG ??
BA - Bank of America?
]

I don't mean to be difficult , but is there some way to settle down with just one credit card? (I don't need to make a billion miles, and I'm not sure I have the time to keep up with all the deals.) If not, how does one shuffle them? Sounds like there's some really complicated strategy.

I live in Tucson, Arizona. NW (Northwest?) does serve Tucson but I don't understand why you ask that. Do they have some great credit card or something?

Thanks again!!