I didn't see it mentioned yet, but have you considered the Citi PremierPass Elite card? If you use it to book your flights, you get points for the miles you fly. Those points, when matched with spending, become Thank You points. So if you buy tickets for a 10,000 mile flight, and spend $10k on your card, you have 20k TYP which can be redeemed for a domestic flight worth up to $400 that you will in turn earn miles on. For some business/first class awards you can get up to $0.03 per point value.

I won't bore you with the details in case you already know about it, but I would consider it and check out the credit card forums for details on the fixed price awards you can get with TYP.