You need to look at the actual frequency of crossover. The general default is 80Hz but that is much too low for the Orbs. Look for an AVR with a setting of 120Hz.
What you need is the Denon receiver line actually, for many reasons. One they will not only crossover your speakers at the proper location, but also do "EQ'ing" that's far supperior to anything else currently on the market! And, if you mount those Gallow speakers on/near the wall, you most definitely need to get an EQ involved...of that you can be assured of! That's of course if you want accurate/dyanmic sound reproduction at all. I do...
James - I agree with KR4. Its not a matter of changing the product because what you're looking for is already there. Its a matter of moving the crossover frequency higher. Maybe even around 150Hz. Even then, be sure to properly blend the sub and satallites or else you'll find the same frustation and wanna switch.
The Cambridge should be able to handle this for you. Cambridge makes fine gear for the price range. Save your money and headache. Work with the Cambridge...and when all else fails, consult the instruction manual.
Don't spend you money too soon until you've picked apart the Azur.
Thats just my opinion.
James...if you don't mind me asking, where is your crossover point for the sub?
BTW, You'd be supprised how much better your system can sound once you've tweaked you denon beyond the auto setup. With auto setup, you're probably at about 85% of your systems top performance. Just something to keep in mind, for what its worth.