I ordered a Kestrel 5000 meter (+/- 2% supposedly) and will be running some tests with it.
Kestrel not only calibrates and certifies every meter they sell, but they promise that if their unit drifts by more than 0.25% per year you can send the unit to them and they will recalibrate it for free within 5 years of purchase. Not sure how most people would determine which instrument is drifting excessively: their kestrel or the sensor they are checking -- but that's another matter.
They also offer a tune-up service for $75. They'll test and calibrate every weather parameter, clean it and install a new wind impeller & battery. Not bad.
I know the military uses these -- they've got a big contract with Kestrel. So do firefighters, athletic orgs, surveyers, shooting clubs and, of course, storm chasers who proudly display them on TV.
I figured it's probably the best you can do under $1000.