I have been craving one of these ofr a couple of years. One that will measure and log rainfall, temps, humidity, wind speed - the whole gamut. Given costs and what they offer, I settled on the Ambient 1090 with the better solar shield. I would love to be able to add a PAR meter, preferably to the weather station or even at a somewhat remote location - as long as the data can be transmitted to my computer. Apogee has a great PAR sensor at a semi-decent price; I e-mailed to see if their sensor could be incorporated into Ambient's system.
I would love to be able to track everything that relates to the weather, sunshine and how it affects growing plants. It feels great to be able to take the first step. Not to mention, I'll be able to post data the Wunderground for the middle Cincinnati area!