I don't fly all that often so I could use the MQMs. I'm at 25k MQMs right now which includes roll over and 10k for hitting 25k on the DL amex. I'll get another 10k for hitting another $25k (paying for things for my company) and then probably a couple flights to Seattle and some work trips. I think it'll be difficult to hit PM again without a mileage run.
ATOBTTR brings up a good point that the 30k miles is a pretty cheap mileage run, plus I actually need to go there.
If I pay with miles, I assume I only have 24 hrs to change it?