I think the list is rather an interesting one. The Twin Bonanza I don't consider all that capable, unless they made models with full de-ice that I wasn't aware of. Plus they have the difficult to support geared engines. The Mojave is less capable than the P-Navajo (with the advantage of conventional engines vs. geared), but only has the advantage over the Navajo Chieftain of pressurization.
I selected the C310 and C340, which I would outfit with the appropriate Colemill or RAM conversions. They are not only very good-looking and capable aircraft (especially with the conversions), but they actually have parts availability. A RAM T310R has performance in-line with an Aerostar but with an airframe that is easier to support and, in my opinion, has a better interior, plus it doesn't run chop off the arms of its pilots. Flying a Colemill 310 on a regular basis now, I have to say that it is an extremely good and capable aircraft that I like a lot.
I think the list is incomplete, though. Bruce's Seneca II is a very capable aircraft (although one could make the argument that the Seneca V makes the Seneca a current production model), but the Aztec is out of production and an extremely capable aircraft (at least, I think so in my biased opinion). The P-Baron, now out of production, is also very capable if you're looking for something in a range similar to a C340 or Aerostar, although it is a bit smaller.
Furthermore, the Aztec will carry ice like a mule (ask me how I know...). The C310 does not carry ice as well (no experience with the C340, but would expect similar), and an Aerostar especially doesn't carry ice particularly well.
