Alex, the answer to that question depends on whether you're playing your system at a loudness level that exceeds the capacity of your 2200 and you're getting distortion in a noticeable amount. If not, adding a more powerful amplifier won't be of benefit. There's no magic in a separate amplifier or an amplifier with a higher maximum output capacity if it isn't needed. Unused headroom is simply that: unused.
By definition headroom is capacity on hand for when you need it. For HT it is very easy to clip a receiver amp and it happens often in every receiver based HT I have been in. John your position on this issue disregards the role that amp capacity and unused headroom has in cleanly reproducing peak audio signals. Its not worth debating this point.
