Definitely the Vantage Pro2... Still using my original installed in 2003. Have replaced rain gage, anemometer and temp sensor once during that time...No other problems to speak of. Backup battery in iss has been replaced 3 or 4 times, so very good indeed. Not a fan of the all in one stations at all... Can't have temp, rain and wind sensor at same height and expect accuracy on all three. Of course budget and installation availability may limit what you can purchase.
The only good thing so far for me is that Dec, at least the first three weeks was ok with some snow and cold....got to enjoy the winter feel leading up to Christmas.
Where we end up Feb temp wise remains to be seen, but with 40 years of records, the last two Febs were my warmest on record...hate to make it three straight.
January finished here as follows.... Mean temp. 37.2° is 5th warmest, Precip. 1.88" is 3rd driest, snowfall of 2.8" is 6.6" below normal. Good riddance!
At least we had a pretty normal Dec temp and snowfall wise, for many of us. Some stations had record precip. totals....This month though, forget it...on all fronts.
Loved Feb 2015...Station mean temp of 21.8° , 2nd only to Jan 1977 for cold...Snowfall was a little above normal at 14" but with the cold, it was plenty.
22° here currently...managed to drop the temp departure to +6° with the recent colder weather, big whoops. Just 0.88" total precip....so mild, dry= boring.