How wise is it to purchase a dipole speaker today? Some have said they are outdated with the days of Dolby Pro Logic. Some say dipoles are still the way to go for all surround applications. Some say dipoles are better for movies and not for multichannel music. Now with Ultra2, they suggest dipoles at the sides and direct radiators in the rear. Sounds like a good plan, but what about possible future 10.2? Will the future outdate and obselete the dipole speaker-or is a dipole surround speaker still a good investment? Have a Paradigm Reference front end and Paradigm only makes dipole surrounds--would have to get a different brand for monopole or one that switches. Any thoughts are appreciated.