The Vizion and 430W are a great combination. If there's a holding fix in the flight plan, either at an initial approach fix or a missed approach holding fix, the A/P will fly to that fix, execute the recommended entry and track the holding pattern just as it's depicted on the 430.
If the missed approach procedure requires climbing to an altitude before turning toward the missed approach fix, you may have to use the A/P in ground track mode until reaching that altitude.
Pierre mentioned the coupled LPV. It will also track the advisory glide path that is available on most LNAV approaches (LNAV+V).
Another nice feature: If you lose the GPS during an approach, the Vizion will go to a missed approach mode, holding the bank angle and a 500 fpm climb.