If your dad primarily wants the HT setup for TV and/or movies, then the Axiom sub should be ok but if he likes good music then have him go with an Hsu or SVS. This advice comes to you from personal experience when I did not listen to the advice on this M.B. so I got the EP-175 and it was ok for movies but was "muddy" with music (classical, jazz, country, and/or rock). I ended up with the Hsu VTF-2 for the exact same price) and returned the Axiom. I love the rest of the Axiom line, but IMO their sub's are sub(standard). Axiom should OEM the Hsu's or the SVS subs. BTW, Hsu is in Anaheim.