Watched Tron Legacy last night. Weak storyline, but great sound and serious LFE --- my cat usually sleeps on the couch when I watch a movie - on this occasion it left the room after a while. The SVS sub handled the LFE very well and there was more than one occasion where the couch I way lying on was rumbling something silly

Got me thinking about volume though, my AVR (Yammie RX-V730) is old and relatively low powered ~ 75W/channel. I was watching at around 30% of max and going louder would've been uncomfortably loud. So I'm guessing a big amp is only there to deal with transients that a smaller amp may have difficulty with?
Also, is the LOTR trilogy a worthwhile acquisition on Blu-Ray?