Welcome and enjoy your stay!
As you can imagine, you can spend as much on a weather station as you want to. However, for accuracy, flexibility, and dependability, many here will recommend either a Davis VUE or VP2. There are many other brands available, so browse around and find what you feel comfortable with.
There is also many kinds of software available. I use WUHU
which is free (I like free!) and the software author reads this forum and is responsive to questions and suggestions. There is also Cumulus which is donationware (donate if you like it) and Virtual Weather Station (VWS) that you can buy from Ambient weather.com
I'm sure you will get other comments/suggestions from the members on this forum, so happy hunting and good luck!
Here is a link to a document that has everything you ever wanted to know about sensor placement (and then some!):http://www.comptus.com/PDF/CWOP_Guide.pdf