It looks like we'll play Atlanta or Miami, and of those two I definitely prefer to play Miami. I think they're a good matchup for us for several reasons: 1) we have the perimeter D to limit their best scoring options, 2) they're a little older and slower team that seems to struggle with younger, physical, and running teams, and 3) we have the stretch bigs to get Whoteside out from under the basket.
Other than that, I'd want Charlotte or Chicago. We've played both teams pretty tough all year going 4-1 I think, though the two Charlotte wins were without Big Al. Charlotte plays too fast and relies too heavily on their outside shooting, which bodes well for us with our perimeter D. As for Chicago, we're just a good matchup with them and play them really tough.
Obviously Washington is a good matchup for us after going 4-0 with them this season, though I don't think they make the playoffs.