Yes. That's a very good price per Watt. I just did a system in New York State under a Solarize program that was $4.30/W. There were other incentives available to me that aren't available in your Solarize program, but that is still a good price.
You can google Solarize to find other programs around the country and compare prices.
Sold old EV: 09/25/11
Color locked in: 10/7/11
Delivery month appeared: 10/11/11
Delivery week appeared: 12/6/11
VIN received: 12/24/11
2012 Nissan Leaf SL