Which offers the most bang for the buck?

None of the above.

Neither Mary nor I have ever used an E6B since we got our tickets. Not
once, in over 1500 hours and ten years of flying.

Put your money toward a nice GPS, or a good pair of ANR headphones. At
least *those* won't end up in a box in a closet.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"