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www.ukweathershop.co.uk]
This is on special offer at the moment, it's not the latest and greatest but if you don't want to spend a fortune it's got quite a lot for the price, esp the special offer price it's really a bit of a steal. The AWS at the ski club hut is a WS3600 which is basically the newer touch screen version of the above model.
If their weather stations can survive 3 months on CairnGorm they can probably do a job for you!
Another factor to consider is how technically minded you are and whether your willing to get 'your hands dirty' on the computer side of things. TBH the windows software which comes with the WS3600 and WS2300 isn't up to much, there is better open source software available called OPEN3600 and OPEN2300, they are linux applications but have also been ported to windows.
It was the flexibility of the third party open source linux applications that swung me to these weather stations, rather than the specs or the software provided with the stations.
Both the WS3600 and the WS2300 can be either hard wired and mains powered or they can run of battery (both the console and the sensors) in which case the sensors communicate by radio wave to the console, thus no need to go boring holes in the wall to get a cable to the sensors.
If your willing to spend more, those who have Vantage Pro stations from Davis swear by them, they are certainly great kit, but at a price.