Axiom Home Page Forums General Discussion Advice from Axiom Owners PLEASE HELP!!! Amplifier for M80s

I am using a Denon 3808 with a Home Theater 5.1 on Zone 1 and Algonquins on Zone 2. I want to connect my Axiom M80s through the Zone 3 pre-outs and need to choose a stereo amplifier to drive these -

Options are -

1) Harman Kardon HK 990 - stereo integrated amplifier rated 300w/ch at 4 ohm - individual power supply for each channel - price here is US$ 1350 equivalent.

2) Onkyo A-9755 - another stereo integrated amplifier rated 300w/ch at 4 ohm (yes, specifically states this) - independent power supplies for each channel - price here is US$ 700 equivalent

3) HK 3490 Stereo Receiver - several redundant functions and less capable but much cheaper than the HK 990 at $420...

Any thoughts on which of the 3 someone would choose much appreciated since I have no clue. in particular, please comment on HK 3490 vs. Onkyo A-9755.

Key points -
1. Would happily pay the extra $200 for the Onkyo if a much better choice but worried since in general Axiom recommends avoiding Onkyo for the M80s (though I suspect this stability concern vs. relates to Onkyo receivers that are rated for 6 ohm and have some indication for rating at 4 ohm rather than for a somewhat higher end stereo amp such as the a-9755)
2. if the onkyo is out as an option, not that keen to spend the extra $930 for the HK 990 vs. the HK 3490 unless HK990 is a much preferable solution and 3490 not really suitable
3. play the M80s to music only in a 30 ft x 20ft room

Many thanks.
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A-9755 SPECS - I am told model not available in the US - here are the specs if that clarifies matters for someone...
AMPLIFIER SECTION
Power Output ........................................................................................ 300 W/Ch (4 Ω, 1 kHz, JEITA)
Dynamic Power..................................................................................... 330 W + 330 W (3 Ω, Front)
270 W + 270 W (4 Ω, Front)
170 W + 170 W (8 Ω, Front)
Total Harmonic Distortion .................................................................. 0.08 %
Damping Factor .................................................................................... 25 (Front, 1 kHz, 8 Ω)
Input Sensitivity and Impedance
Phono MM .......................................................................................... 2.5 mV/50 kΩ
CD ....................................................................................................... 200 mV/50 kΩ
Output Level and Impedance
Rec out................................................................................................ 200 mV/2.2 kΩ
Phono Overload.................................................................................... 70 mV (MM, 1 kHz, 0.5 %)
Frequency Response ........................................................................... 10 Hz-60 kHz (+ 1, - 3 dB, CD)
Tone Control .......................................................................................... + 10 dB, - 10 dB, 100 Hz (BASS)
+ 10 dB, - 10 dB, 20 kHz (TREBLE)
+ 10 dB, 50 Hz (LOUDNESS)
+ 2 dB, 10 kHz (LOUDNESS)
Signal-to-Noise Ratio.......................................................................... 100 dB (CD, IHF-A), 70 dB (Phono, IHF-A)
Speaker Impedance............................................................................. 4 Ω-16 Ω
GENERAL
Power Supply........................................................................................ AC 220-230 V, 50/60 Hz
Power Consumption............................................................................. 125 W
Standby Power Consumption............................................................. 0.3 W
Dimensions (W x H x D) ..................................................................... 435 x 144 x 431 mm
Weight .......................................................................................... 17.6 kg
RI (Remote
Interactive) remote
A-9755
INTEGRATED DIGITAL AMPLIFIER