speaker degradation question

Add a good subwoofer for HT if you like your main speakers. The salesman is doing what all salesmen try to do...make you discontent with what you have in hopes that you'll buy the latest "hot" item. It's not like he doesn't profit when you fall for his line and buy his goods...:)

Justy-Plato is right. The only different requirement for HT is a good subwoofer for the effects channel (and maybe another if your L&R have no real bass, like my NHT Superzero's). If you are going to upgrade, spend the $ on a good center channel that matches well tonally with your L&R. And of course at least equally good speaker cable for the center.

I have an excellent sub, (sunfire signature) and a center that i feel is timbre matched (Sonus Faber). I suppose my question should be, loudspeakers have not changed much enough in the past decade for me to worry about obsolesence, right ?