The
Ted Smith Aerostar is the fastest production piston twin, however it can only carry 6 people, has limited payload and range.
![](http://www.pilotfriend.com/aircraft%20performance/aerostar/1.jpg)
The
Beechcraft B60 Duke has slightly more payload and range, but is slower and is a gas guzzler.
![](http://farm3.static.flickr.com/2378/3540287558_82e3eae4cd.jpg)
The
Cessna 421 has much better payload and range, but has expesive to overhaul, geared engines.
![](http://www.aerocare.com/images/cessna421C.jpg)
The
Piper Navajo is slightly slower than the 421, but has counter-rotating engines, which are safer when the left (port) engine goes out.
![](http://www.pipercessna.com/images/Cheiftain-pic-1.jpg)
(bonus points to whoever can identify the plane in the left of this pic)
![Wink ;)](http://www.intensitysquared.com/Smileys/default/wink.gif)