AV receiver advice

[bwspot]

After living with a high frequency tone in my ears for 2 months i am slowing starting to miss this forum. I wont experiment anymore as i am afraid of ringing, but i decided i will guess this time and i will get sr5009 when it is out. I hope it wont do any harm to my ears. I do love music and cannot let it go just like that. I need to accept the ringing for now.
Again, note to everyone. Protect your hearing and dont go over 75db!!!

 

[bwspot]

So my dad purchased Nr1604 and I was able to connect it to my M60s and was amazed how well they played with only 50W of power.
Definitely I can tell Marantz sounds great.
But my dad has Cervin Vega speakers so we tested it with Nr1604 and it seems like the center speaker is very silent.
After running calibration it was adjusted +12.5db and rest of the speakers only 1-2db.
Is Nr1604 enough to drive:
VE 5M CERWIN VEGA HOME AUDIO SPEAKERS

M60 play great and satellite speakers are good too:
VE 5M CERWIN VEGA HOME AUDIO SPEAKERS

Accessories4less claims that there is not enough power for the center speaker.

But this does not make sense as M60s play perfectly.
And if I do calculations on line it seems like I have just enough power to play around 70-80db.

What do you think?