As a separate issue, I am also looking at the Jepp TechStar, the CX-2
Pathfinder, and Sporty's electronic flight computers.

I purchased one of the large format E6B Electronic computers from Sporty's -
ended up sending it back and getting a CX-2 which I'm very happy with
(although I don't know why they can't make them 1/2 the thickness). The E6B
was confusing to operate and (despite that) had a fault where the thin
aluminium key surround came unstuck in the middle and was actually higher
than the top of the key - very poor design and quality. I haven't seen a
pathfinder, but I did read a review that said the contrast / font made the
unit all but impossible to read in anything but ideal conditions - although
someone else commented that they were very happy with it.