C6300 Frequent disconnects

Seems to be a common topic here, but don't think I've seen a definitive answer so gonna try again.

Purchased a C6300 because it was (seemingly) the best modem / router out there supported by Comcast.  Not cheap, IMO, so kinda had high hopes, but...not so much.

Some background....

Prior to puchasing this I had a comcast box that just wasn't cutting it.  The range / power of the device that I was "renting" from Comcast couldn't reach many parts of the house so wanted a solution.  First thing I did was to purchase a Lynksys LAPN600 Access Point, which did the trick wonderfully.  However, I was still renting they modem / router from Comcast, so to be rid of them once and for all purchased the C6300.

The pros - the signal is strong.  Like the interface as well and set up seemed easy enough.  But the Cons - ugh - Frequent Disconnects.  A better discription would actually be "micro" disconnects because they last about 15 seconds.  They are so fast that the wireless devices (iOS devices and 3 Windows 7 laptops) don't even show they are disconnect.  In fact, hovering over the network icon shows it's connected, but if I'm surfing the net during a micro-disconnect it will say page cannot be displayed.  Again, it's all Wireless devices at the same time, so I know it's not a laptop / iPad / iPhone issue.

Thinking that perhaps it's the Linksys AP that might be the issue - as in, maybe the AP is too close to the C6300 and somehow they are competing for connection.  Hope.  Disabled the Linksys completely - both by powering it off physically and by turning the Radio on the AP off.  Still, disconnects.

I've tried to read the logs on the C6300, but the only logs I can find are really of no help.  There's something about repeated DoS attacks, but the timings dont really correspond to when the micro-disonnects happen.  Methinks events such as this SHOULD be captured somewhere, but...where?

I was actually frustrated enough that I called Netgear support since the device is sitll new.  And then I got REALLY frustrated.  The tech I spoke with told me to reboot the device since it had done a recent Firmware update.  I explained that I was current with Comcast - v1.02.21 - but he was rather insistent.  So I reset, per his request.  It had been up just a few minutes after the reboot and he asked if I saw the disconnect issue. "No", says I, "but it's very random and I don't know what a reset would do anyway!"  I inquired if there were logs to look at, to which he had a snarky response to the effect of "If I thought there was something to learn from the logs I would have done that already."  Well, Mr. Smarty pants was a huge fail, because even though I had no drops in the five minutes we spent after the reset, it started the mico-disconnects but a few minutes after I hung up with them.  Brother....

So, I've tried everything I can think to do and yet get the haunting suspicion that I'm missing something - probably something very...basic.  In summary...

- I don't believe it to be my wireless devices because when it happens to one device, it happens to all of them.

- I don't believe it to be the AP that I have since the issues persists with the AP offline / disabled

- I've also disabled the Wireless 2.4 and 5 on the C6300 and used the signal from the AP, and the frequent micro-disconnects still happen.

- I suppose it COULD be a Comcast issue, but given that I've one all "rogue" on them and am no longer renting my modem / router from them, they probably won't give me the time of day if I open a case with them.

Would love to figure this out. I want to make this device work because I've heard others say very good things about it and stats & feature wise it looks to be better than anything else out there that comcast supports.

Any suggestions?  Am I missing some logs that might give me an indication of what is happening, either on the 6300 or in Windows maybe?

Thanks for ANY help...

- S