the other thing to ask is if the extra 5 (say from 20 to 25) really gives you any additional volume? Conspiracy theorists (and I'm not sure I completely disagree) believe that manufacturers purposely tweak their machines so the most volume gain occurs in the first 1/2 of the volume range of the machine. So then, for example, someone walks into an audio store and is looking at receivers. They crank the volume up to halfway and it's extremely loud. They immediately think that going the other half would make it twice as loud, when in actuality, there's very little gain there. They're impressed with all the power, and buy the receiver. It's possible that 80% of your volume gain occurs in the first 50% of your recievers volume setting.
