I've decided to keep the 60CSx I bought from REI for $199.99.
I asked REI to match the Cabela's deal, but they said, "No." Then the guy told me some stuff about the REI (so called) difference. In the end, the price of $199.99, the uncertainty about the an event eight weeks in the future, my desire to do the GPS thing now, what the guy said about REI's co-op nature (I'm a member), and REI's 100% satisfaction guarantee, tipped me towards venturing forth with the 60CSx in my hot little hands.
By the way, REI has it's own bundle: a Dakota 20 with the TOPO U.S. 100K DVD for $250. That tempted me for a bit, but in the end I did what I did.
Finally, the 60CSx from REI had everything in the box that the Costco unit has and the Paradise Valley store (I believe) just restocked.
Decisionmaking and action should only be informed by, not subject to, healthy, reasonable concern.
That being said, anything worth doing is worth doing to excess.