I once made the mistake of asking a race driver (not rider) which one his team used...

Boy was that man excited about the topic!!!
Anyway, what I took away from it (besides a diminishing hearing ability) was that LONGACRE made some pretty good ones and that I had to buy the one that had the limit closest to my use (i.e. if you use your tyres at 35psi you don't need one that can read all the way up to 100).
They have a bunch of different models but the best bang for bucks (and this is only MY OPINION!) is this:
http://cgi.ebay.com/ebaymotors/LONGACRE ... veQ5fToolsreads all the way up to 60psi in 1psi increments.
Not the cheapest, hey?!