Jim Jackson is definitely a move towards improving the players around Kobe, just like how it was back with Michael and the Bulls. And yeah, just like with the 3-peat Lakers recently. You got Kobe (MJ), Lamar (Scottie), and a bunch of other guys who fill a specific role. Jimmy and Devon play hard and are the type of players who you don't think too much of but can end up seriously hurting you (i.e. a player like Horry).
As for the Mavs going deep? The Mavs or the Spurs WILL go down by the Second Round. With the way the seeding is, and with the way their respective records are, they'll face each other in the second round assuming they both make it past the first. Even though that statistically the Spurs are no.1 and the Mavs are no.2 in the west, because of the Division leaders automatically getting the top 3 seeds, the Mavs are no. 4. The no. 1 team will face the no.4 team in the second round, and 2 vs 3, assuming they all make it. So, yeah, don't expect either the Mavs or the Spurs to BOTH make it to the Conference Finals. One of them has to fall by the second round.