Ok... I bought the Extech MO200. I also bought a temp/humity datalogger with a wireless remote sensor that I'm going to place in my crawlspace to monitor relative humity in both the crawlspace and in the house. I'm feeling kind of paranoid after reading through all the cupping threads.
I bought both units from a place called AmbientWeather.com The datalogger with remote wireless sensor was only $50. I'm going to buy an extra wireless sensor and use it as my own personal weather station.
http://www.ambientweather.com/lacrtewswiin.html
I don't have any association with the place. Just sharing the information.