I'm against using meters of water as the pressure unit only because it will lead to awkwardly small numbers. Millimeters water would be better, I think.
All the others look fine to me.
The C/W thing bugs me because the actual name of that value is the thermal impedence. Its units are usually (as they will be here) in degrees C per watt. Why people choose a very specific set of units to be the symbol for the number makes absolutely no sense to me.
The units are not ohms because those refer specifically to voltage potential over rate of current, so its units are almost always volts per amp. They have relationships that are similar to those in heat transfer but their units are quite different.
Power the US is almost always in watts (our power bills are in kW*hour) or BTUs per hour. Watts are clearly the more convenient unit.
As for a conversion program for lazy Americans, I wouldn't worry about it. All one needs is to convert ambient temperature and CPU temperature, really, and even here most people dealing with PC cooling tend to use Celsius.
In this thread you might also want to make sure we all use the same name and symbols for pressure, flow rate, thermal impedence, heat transfer coefficients, etc etc.
Alchemy
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