Re: Outdoor audio
Any system you like should be ok if it's going to be closed in.
Something to think about. Not sure how expensive it would be though. A friend closed in their front porch a few years ago. They used sliding glass patio doors, with screens, as their walls to the new room. In the summer you can slide the doors open, and with the screens there, it's like having a screened in porch. In the winter, all that glass attracts the heat, and it's like a sun room. I thought it was a fantastic idea. I would do the same thing if our house had a porch. Their's was a great place to sit and visit, when we went over.
Good luck with whatever you do.
1080p Samsung HL61A750 LED DLP / Onkyo TX-SR805 receiver
Oppo BDP-83 / Polk Audio LSi9 fronts / Polk Audio LSiC center
Sony SS-MB100H rears / SVS PC12-NSD / Pioneer PL-514 TT