Just reading the specs it's hard to tell if an amp has the beef to make a difference. I've owned 50 watts amps that are powerhouses and 100 watt amps that were weak. My new 32 watt tube amp is stout. So I suggest getting a quality amp or a higher power consumer amp. The reason is that if you buy an amp that is a quality unit and has enough power to drive any loudspeaker, you can keep it and use it for 30 years or more. When you think of it that way, the extra bucks make sense. The Yamaha you picked out might do it, I don't know, however I have owned a Cambridge integrated that was 60 wpc and I thought was was slightly lacking in power.
"Oh I'm sorry, is this a five minute argument, or the full half hour?"