boutique retailers who have specialty world-beating, better-mouse-trap products [examples are UST, ACR, and AMR].
About the latter, debate will rage [and as new products and retailers emerge things will change so will opinions] - detecting these requires personal experience and watching the opinions of those you trust on fora like ETS.
That is a good way to put it. I am on the lookout for the most innovative "mousetraps." By "innovative" I mean the best bang per weight and volume like the original PSP.
Jeanette Isabelle