The most important part is to listen for yourself.
Zumbo has a Yamaha 1400. Not much different than the 1500, which BTW I also own. Klipsch are fine speakers. They probably have the best bass response of any speaker line for under $1000. But the horn tweeter leaves no gray area between Love and Hate. I've listened to Klipsch through an RXV1500 and I'm on the hate side. At least when paired with a Yamaha receiver. Those same speakers sounded great through an Onkyo 702. They actually were the only speakers of the ones I listened to that particular day, (Klipsch, Polk, and Infinity), that made the Onkyo sound better than the Yamaha.
Listen for yourself. But my advise is listen through a Yamaha receiver. Pretty muck any one of the models from an RXV550 on up pricewise will sound the same as your 1500.