My bad on linking to the HK xx4 thread -- similar problems with the xx7's:
http://www.avsforum.com/avs-vb/showthread.php?t=868358&page=75
If you learn one thing in your research, noaudexp, it's not to buy a modern receiver without a factory authorized warranty. The last thing you want is to have to face your wife with a broken unit and no way to get it fixed.
Yet another source of info, this review includes the 576 and the 1909:
http://www.homecinemachoice.com/node/10081
Save the .pdf file to your computer to read it in a full sized window.
The UK audio market differs from ours in product usage, relative pricing and availability, so their relative value judgements may not apply in our market, but there's lots of good info.
Noaudexp, what speakers did you get? And how big is your room? Inexpensive receivers can have trouble playing loud in a big room, and/or with low impedance speakers.