I would highly recommend either a Davis Vantage Pro2 or a Davis Vantage Vue. They are just so durable an long lasting, and you won't beat the sensor to indoor unite update frequency and overall accuracy of these units.
Add either the new updated console, or a WeatherLink Live unit (which is what I use in my case) in order to send data to any online site such as WeatherLink.com, Weather Underground, and PWS Weather.
Check out Scientific Sales or ScaledInstruments for purchasing options.
Hope this helps!
- Matt