Zander 940/941 or ZS-1 Flight Computers???
Zander has probably the best variometer available, plus working
thermal assistant. Amount of information you can get from the system
is overwhelming. Which makes it a bit difficult to use. SR940 has a
bit restricted graphics and no area task support, so PDA is required
if you need them. ZS1 has better screen and is easier to use. More
than few world-championship-class pilots I know rate the Zander system
best there is.