I voted for Scal. I generally like more objective commentary, plus Scal has a few interesting tidbits of insight now and then on the plays being run and stuff like that. Plus he has some anecdotes about playing with Pierce and KG, who are my two fave players.
As an aside, I don't know how anyone who likes Tommy can be salty when hearing bias from another team's commentator. Lol. I mean, I don't complain about biased commentary but I see some posters really get upset about it.