Several years ago, my wife and I were in the same boat (see what I did there?). We bought a 2003 nautique 206. I has the walkthrough OB but is a foot longer than most Tournament slalom boats of its era. It did everything, course ski, foot, wakeboard (sacked), surfed, learn to ski, cruise, etc. At the time I was the only course skier skiing at 34. Since the whole family has started skiing the course, we just bought a ski 200 OB.
So, I would consider the 206 as something to consider in addition to the Malibu DD with a wedge.
Second the don't buy a v-drive. You will slow the kids development as a wakeaboarder as they will not be aggressive to the wake when it is too big.