I believe those manufactured by Davis have a very good name. I purchased an IRO Pro a few months ago. It cost well over £200 but similar items are now available for half that price, or less. The forecasting "facility" appears to be based purely on the barometric tendency so it's a waste of time. We've had lovely clear sunny days when the weather station has been showing tipping rain.... and torrential wind and rain when it has shown a "sunshine" symbol. Also, be warned that unless you can mount the anemometer head absolutely in the clear you might as well not bother. Mine is on a 25 ft pole but when the trees are bent horizontal it says "3.4 kts" and when the trees are still, but slight eddies build up around the garden it says 10 kts!!
What we had prior to this was a simple thermometer system which read indoor and outdoor temperatures which was perfectly adequate.
Oh yes.... the wireless link system messes up our burglar alarm!!!