I wish I had homes in both places - After a year of being unemployed IT I sold the AZ home and went to NY.
I strongly encourage you to join the AZ PCA (Porsche Club of America) - They have 3-4 activities a month, normally including a monthly drive and a monthly meeting (usually with free food).
http://az.pca.org/
Things will really slow down in the summer heat, but May is still a busy month for the club. Hiding from the heat in Az is a lot like hiding from the Snow, but you don't have to worry about slow drivers, road salt, and sliding off the road.
When Porsche made the worldwide press premiere of the Boxster it was in Scottsdale, AZ. To duplicate the road they chose to show off the Boxster - Go north from the Scottsdale Princess on Pima, Turn right at the stop sign in Cave Creek(cave creek road), turn right again in a few miles at Bartlett Dam road. When you reach the pay entrance to the lake, turn around and drive back. Bartlett Dam Rd will really show off what a magnificent car you now own!
If you go this route, watch out for offroad traffic in the gravel wash before the pay rd into Horse Dam Rd - other than that you usually have the road to yourself on a morning or weekday.
If you want to put on 200+ miles in a day:
AZ motorcycle roads
http://www.cbr1100xx.org/nav_rides.html
Salt River Canyon (a Looonnng day's drive)
http://www.azcentral.com/travel/arizona/features/articles/archive/saltrivercanyon.html
Coronado Trail
http://www.scenicdrivesonline.com/routes/SouthWest/AZ/AZ_4.shtml
Thor - aesir - got it.