Nope. Especially not for music.
I would agree with KEW, an avr is much better than a regular stereo receiver. You get bass management, an onboard, often high quality DAC, music streaming services, and the ability to add more channels down the road. Heavy metal sounds great in 5.1.2 via Dolby surround
If you decided to add something less capable in the bass department for surrounds (such as rp-150ms), the AVR can re route all of the bass to the RP-280fs, essentially treating them as the sub. With Klipsch speakers, up to a certain point, power becomes irrelevant. My buddy bought a pair of KB-15 bookshelves off me and paired them with one of those crappy mini amps (the amp in question has actually been bench tested to deliver a measly 3.5w continuous into 8ohms) and just for fun, we decided to see how much volume we could get out of the amp/speaker combo. We measured about 95dB at 6’ away before the amp started clipping.
I’d try to go for Denon, they’re cheaper than Marantz, and unlike onkyo, they offer Audyssey room correction, which is one of the best.