Thanks for all your input.
I may stay away from the Denise for now.
I have a Boye needlemaster set and the cables are just too stiff for me, even with Cacun's modified cable. They are also metal and a risk for flying as well so they won't fit the bill. I keep them in case I want to learn knitting with 2 circs. The case for them is so well organized!
I have heard of Zephyrs breaking, too. I adore KnitPick. I know they do replacements without question but I'm moving to Switzerland for 2 years and I don't think they will pay international shipping to replace something. Thanks for the info about the coupon.
I might go with Harmonys. I was hoping to get away on the cheap but I might have to spring for them!!