If you don't want to 'memorise a manual, or wonder what 4 differently shaped and coloured symbols mean' you definitely DON'T want to buy a B400. It's got to be the most un-unintuitive vario that I have ever had the misfortune to fly with.

Really? It beeps differently for up and down, has one button which turns off down beeps or gives average and a volume control. Doesn't do anything else! Are you sure you're not thinking of a B500?