Yeah, I know, lists suck, but everyone has one.

Ted Leo and the Pharmacists - Living with the Living

Slots in this list are going fast...
Andrew WK - I get wet comes in second.

I nominate Ezra Furman - Perpetual Motion People

BIG HELLO - Apples & Oranges
This 2001 CD wins by default, as it combined the 1998 Apples release with the 2000 Oranges release to qualify.

And voila! The single greatest collection of power pop tracks ever released during the 21st centuries first quarter, period.