Like VS540 said, speakers are a matter of preference. I would recommend M&K speakers for both music and home theater. They are simply fantastic. I have the S-150s and put them on the M&K stands (extremely heavy, made by the barbell company York). But it's my peference ... in general I enjoy studio monitors and speakers the best. It's a matter of taste in sound. You and her should go demo some speakers!
I noticed the recommendation of the Monitor Audio S8 speakers... One of my dad's home theaters had Monitor Audio speakrs, Silver S8 speakers L and R, and while they were good, I didn't feel they were a very good home theater speaker. I was kind of unimpressed in that aspect. (see?! It's all preference)
It should be noted that the M&Ks are great, but they need a badass sub. I have a Velodyne HGS-18" in my home theater with the S-150s and he has an Apogee Profressional Subwoofer in his (he just uses that room for movies, so, no worries about a musical sub there).
So, my basic recommendation for your system's sound reinforcement is M&K S-150s (left, right, center) and M&K rears, either dipole or tripole, depending on your setup and the room. For a sub, I would look at Velodyne, M&K and Genelec.
Good luck with your search!
-Chad