I'd highly recommend this setup for anyone in the same climate as me. I don't really NEED air conditioning so a heat pump isn't going to be used in summer much at all. I plan on using other means to cool the house (
this is one example/possibility). Also, solar power is practially free once its installed, heat pumps do have a running cost even though it is pretty small compared to most other forms of heating. So, I think if you need to use a lot of AC, a heat pump would probably be better for you. If you don't need much AC, you can get away with a solar setup and some smaller form(s) of cooling.