Well here's what I found.....
I took my Diamond rio loaded with some MP3's and went to Frey's and BB.....
Now maybe this is not a good way to test speakers because it hardly simulates game or dvd performance but none the less this was good enough for me....
The highly reguarded Klipisch pro medias were loud and powerful....especially the sub....But the bass wasn't tight and overall they weren't as crisp, clear, and tight as some of the other speakers I tried over a full range of voulume....
The only Boston acoustics I could find were the BA790.....I thought these were very good, they make me want to hear the BA4800's even more, which I think I can find at CompUSA...
The bass was very tight through the entire volume range and the sat's were crisp and clear.....While not nearly as powerful as the Klipisch the sound quality was much better
Altec lansing ATP-5.....These really surprised me.....The sub is very capable and the sat's use a 3" driver and 2 28mm cones so that's a sub, 4 drivers, and 8 tweeters along with bass and treble controls....They give really good sound although the downward fireing 3" drivers might be kind of hard to set up for surround sound... any way right now it's either these or the BA4800's(which I have yet to try)....
Midiland S4 4060.....These were ok.....well better than ok but not outstanding.....I really like the control module pod with the volume,mute, bass , treble controls....
I now have some THX bass test tracks....I hope I can try those at CompUSA..... 🙂