SAC 7B

I have been thinking about getting a SAC 7B camera to suppliment the Toucams I have. I was thinking of getting the Peltier cooled version. Besides the benefit of cooling and long exposure (which I might use 5% of the time), what other benefits would I see from this over the Toucam. I'm thinking that the cooling feature would be good since I live near Phoenix, Az and in the summer, even after midnight the temp often is over 90 degrees.

Most of my imaging is planetary, btw.

Thanks!!
Paul Maxson