It was reported last night, that the Raptors star PG would opt-out of his contract for the 2017-2018 season, and test free agency, specifically with Western Conference teams. This is a huge blow for the Raptors is Lowry does in fact leave Toronto, because not only is the backcourt duo of him and DeMar DeRozan one of the best in the league, but with the Raptors looking to continue to build to battle LeBron and the Cavs, losing Lowry is a huge step backwards.
Lowry struggled staying healthy this season, as he only played in 60 games, and missed time in the playoffs as well, but he did record a career high 22.4 points per game, while adding 7.0 assists a game and 4.8 rebounds, and is certainly one of the top-7 PG's in the NBA, so whatever team can land him will take a big-step forward.
In my opinion, I think Lowry should stay in Toronto, and continue to help that team build, because they are only a few pieces away from winning the East, but then again, maybe not because LeBron James seems virtually unbeatable, but the West is no easier, with the SuperDork team of Golden State adding as many All-Stars as they possibly can to beat the Cavs.
However, if he does look to the West, I think the best landing spots for him would be the Spurs, the Clippers (if Chris Paul leaves), and the Jazz. The Spurs are definitely the best fit, because Tony Parker's career is now looking rough after his injury this postseason, and the acquisition of LaMarcus Aldridge has not panned out as the Spurs hoped, so Kawhi Leonard and Kyle Lowry as the 1-2 punch with LA down low could be the move the Spurs need to help them beat the Warriors next season.
We will just have to wait and see how this situation shapes out, and I'm sure in the coming weeks there will be a ton of NBA free-agency news as more teams fall out of the playoffs, since we all know it's going to be a Cavs vs. Warriors Finals.