CDY, welcome. You appear to have picked up a few audio mythologies elsewhere on the internet. The Axioms aren't "bright"; it's the recording being accurately reproduced which may be. Neither the Yamaha nor any other competently designed receiver will add a sonic character of its own when operated within its designed power limits, so there's no need to be looking for a "match". The Yamaha will in fact provide at least the rated 100 watts in "real life", otherwise it would be in violation of the FTC amplifier power regulations. This should be ample in most cases in your size room, depending on the average sound level that you employ and the dynamic range of the program material. Unused maximum amplifier capacity can't make a speaker "shine".

Enjoy the music, not the equipment.