Let's face it — the best and most powerful teams in the NBA don't really change from week to week. A handful of results in the middle of winter can only mean so much to a franchise's championship hopes. What does shift regularly, though, is how much interest a squad can hold over the course of a season. Every Monday, BDL's Most Interesting Power Rankings track the teams most worthy of your attention. THE TOP FIFTEEN 1. San Antonio Spurs (36-6, last week: 2): The Warriors still hold the league's best record by a 1 1/2-game margin, but it's increasingly difficult to argue that the Spurs aren't playing the best ball at this moment. Thursday's win over the Cleveland Cavaliers was arguably their most impressive performance of the season — they trailed big early, had their few weaknesses exposed, and calmly built a comeback that allowed them to finish the game in total control of the proceedings. They then followed up that win by trouncing the Mavericks 112-83 on Sunday, running their winning streak to 11 and their home record to 24-0. Their average point differential since December 1 is plus-19.3 , which means it's actually sensible to predict a San Antonio blowout every...