Hm... I sure don't want to tell anybody they have to do it my way... So let me just explain some of my decision-making process, in that regard. Anyone reading may choose to do it however they'd like.
In my case, I don't remember the first time I ever bought a soft drink. I don't remember how I decided whether to try coke or pepsi first. I do seem to recall some of my friends recommending that I give Mountain Dew a try, at some elementary-grade age. Today, though, when faced with a new soft drink, if I choose to try it, I won't have a problem waving good-bye to the 75 cents (or $2.50 if in a restaurant) I invested in the experiment.
When I bought my kayak, I did not have any experience upon which to base a preference of coke versus pepsi. And, in my case, $700 was more than I wanted to invest in an arbitrary experiment. If I didn't like my choice, I wasn't about to stick another $700 into the vending machine to try another one. I don't know how high the resale value is -- you may only lose $50 to $200 if you turn around and sell your yak after two outings... But in my case, I wanted to invest a little more effort up front, to increase my confidence that I'd be happy with my choice.
That investment came in the form of talking to people who had gone before me. I did not stop at "which one did you get", although that was part of it. I wanted to know the details -- why did you pick this one or that one? A lot of people choose the Hobies for the pedal drive -- I decided that was not important to me, so I was not going to spend extra money on it. That does not make it unimportant to the guy who bought it -- he made his decision, I made mine.
Ultimately, though, it is indeed your decision. If you like the Kingfisher, go for it! If you like the one that BJ's sells (don't remember what it is, but it's inexpensive as well), go for it! I certainly will not tell you that you chose poorly. If you use it for ten years and it never disappoints you, then you have no reason to regret that decision. I would encourage you to try to test-drive them ahead of time -- I really doubt that BJs will have a demo day, I have no idea whether West Marine has something set up to allow test-drives. If you can find someone who already has one, by all means, ask them for a test-drive. If you want to test-drive my Manta, drop me a PM. But personally, I still think it's wise to do a certain amount of research about what other peoples' experience has taught them, and consider that information in light of your own needs, your own experience, and your own preferences.