Best place to buy airfare?

[ABV]

I'm going to Arizona in January and am going to book a flight this week. I was wondering where others here have gone to find good deals on airfare. Prices seem to range anywhere from $214-$250 depending on dates and times (yet to be determined.)

I've tried Yahoo, Orbitz and Travelocity and the prices are mor or less the same for comparable flights. I went directly to NWA and the price was about $5 less. The Sun Country website was slightly higher.

Is there anywhere else I should be looking? I think these are pretty good prices for round trip airfare, but if by chance there is some place with even better prices, then I might go there instead.