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'But, the best is still the old Beam Type...'
Interesting. Do you mean the type that has a graduated plate with a pointer??
Many years ago when I bought my first torque wrench I went to the Snap On shop and asked for one of those. The guy behind the counter sneered and said "We sell torque wrenches, not guessers."
I was effectively put in my place and ultimately bought a Snap On 150 lb/ft dial type wrench for $65, a pretty good pile of money for a torque wrench in those days.
As for $5,000 for a torque wrench, a hell of a lot of engines have been rebuilt using wrenches that cost a lot less then that. A commercial rebuilding shop might be able to justify such a device, but I bet the reason for using it has more to do with repeatibility and durability over thousands of operations than strictly accuracy.
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