I think it's a bit misleading to give the standard "if you keep waiting for the next phone then you will never buy anything, hence buy today". It's probably fair to say that no one would recommend buying an LG G3 today, since the G4 will be announced officially very shortly. While this example is extreme, it shows there can be value in delaying a purchase.
Back to OP's problem though, there doesn't seem to be much new evidence regarding a new and better N6 coming out soon. Depending on your confidence level in this rumor, you might decide it's worth waiting a couple of months before getting a new phone.
I wonder though if we wouldn't have heard more if the rumor were true.
I was also hesitating getting the N6 because I was hoping for a 64 bit processor, but now I actually don't care. I'm very happy with the phone, and provided the battery life doesn't deteriorate too much I hope I can keep it for about three years.
Posted via the Android Central App