Another vote in favor...
Ten years and three children ago I would have spent the $200 or more required to get a hat which is screen accurate to exacting detail.
Case in point, I spent $300 for a 10K gold replica Broncos Super Bowl Ring in 1998...and it didn't even look that good....
But these days, I have to be a responsible geek.....
The crushable is my choice, at $30 with my 25% off coupon from Sheplers.
No, the pinch and the crown is not exactly Indy-accurate, etc...etc....
But - as others in this thread have stated, it is instantly recognizable as "Indiana Jones" to the pop-culture aware public, and is a great inexpensive option. Only the "true believers" will criticize it, in which case just tell them to get a life.
You also won't be afraid to breath on it; you can actually WEAR it once in awhile, unlike the higher-priced options.
I'd say it's the equivalent of a replica baseball / football jersey (~$30) versus an actual authentic licensed team jersey the same as the players wear (~$250). The former serves the same purpose, is much cheaper, and can actaully be WORN to the games without worrying about damaging the collectible value.
Mine has been sat on and manhandled by my little Indy Jr's, and has stood up well.
See also the "close enough" Indy gear thread...this is front and center in that category IMO, right along with my $35 bullwhip
http://raven.theraider.net/showthread.php?t=14218