Yes, I think you will be fine with 105w. Yamahas of late have been delivering their rated power. Regardless, for those speakers it should be plenty unless you are looking for extreme levels of sound, in which case I would say some larger, more sensitive speakers might be necessary.
I disagree with your statement about power delivery of teh Yamaha's.
HT Labs Measures
Five channels driven continuously into 8-ohm loads:
0.1% distortion at 50.4 watts
1% distortion at 59.7 watts
Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 30.2 watts
1% distortion at 35.2 watts
Analog frequency response in Pure Direct mode:
+0.12 dB at 10 Hz
+0.03 dB at 20 Hz
+0.07 dB at 20 kHz
–2.44 dB at 50 kHz
Analog frequency response with stereo signal processing:
–0.18 dB at 10 Hz
–0.06 dB at 20 Hz
–0.33 dB at 20 kHz
–58.24 dB at 50 kHz
This graph shows that the RX-V1065’s left channel, from the multichannel input to speaker output with two channels driving 8-ohm loads, reaches 0.1 percent distortion at 120.7 watts and 1 percent distortion at 142.2 watts. Into 4 ohms, the amplifier reaches 0.1% distortion at 143.9 watts and 1 percent distortion at 180.7 watts.
In 2 channel mode under 4ohms, this receiver should be closing the gap at almost twice the power but all it can spit put is an additional 20+ watts and additional 40 +watts at 1% distortion.
Compare this too the older Yamaha RX-V1800 tested by Sound and Vision..
STEREO PERFORMANCE, DIGITAL INPUT
Reference level is –20 dBFS; all level trims at zero. Volume setting for reference level was -3.
Output at clipping (1 kHz, 8/4 ohms, both channels driven): 150/237 W (21.8/23.7 dBW)*
Distortion at reference level: 0.02%
Linearity error (at –90 dBFS): 0.2 dB
Noise level (A-wtd): –74.8 dB
with 96-kHz/24-bit signals: –85.4 dB
Excess noise (with/without sine tone)
16-bit (EN16): 0.6/0.8 dB
quasi-20-bit (EN20): 13.3/12.1 dB
Noise modulation: 0.6 dB
Frequency response: <10 Hz to 20 kHz +0, –0.3 dB
with 96-kHz/24-bit signals: <10 Hz to 44 kHz +0, –3 dB
Unless HT now uses 20-20Khz in their testing that I'm not aware of, I wouldn't put much stock in the 1065 as a powerful receiver.