Be very careful about claims of "THX Certification" as what that represents has become diluted. There is THX for a number of different types of equipment and even THX for cars (2003 Lincoln LS). Know that very few of them come close to the big-screen theatre sound standard that we've come to know.
Practically speaking, it is all somewhat of a compromise and if you are truly seeking the highest in audio fidelity, you should probably look towards conventional stereo equipment. These fancy five and six way sound systems may be cool for gaming presence, but if you seek music reproduction, they aren't worth half the money.
