Uh oh... did you just say the magic words??
I second saving on amplification and upgrading to the Ultras! I have the towers and bookshelves and love them. They're very accurate, neutral speakers and can handle lots of power. I've never bottomed them out or even heard them misbehave, even at some pretty extreme volumes. They're not just loud tho. Like I said, they're also accurate and detailed. They're just also good at maintaining their composure at high volumes.
They also have a very generous return policy, which is partly what got me to give them a shot. I knew after the first day they weren't going back tho. I stopped realistically looking for speakers after the Ultras. I say realistically because I will never stop looking for better speakers, whether or not I can actually afford to buy them is another story, lol.
*Edit: This video also helped sway me. Gene and Hugo seemed very pleasantly surprised by how good they sounded. The towers are basically the bookshelves on steroids with much deeper bass extension. If you have a sub or 2 in the mix the bookshelves will get you 95% of the way there, IME. YMMV, etc.