OK went to showroom a Mega at the ATT store. They were happy I was asking about it because it gave them an excuse to open their only one for a display model.
Wow, that's an awesome phone. There was some lag, but it was mostly touch-wiz lag. Apps performed as expected with no complaints here. I was able to thumb across it without any issue, I guess I'm used to doing it. The screen resolution doesn't really bother me. I actually kinda like it because everything was readable from a distance instead of having a tiny screen smashed in my face.
They did let me put it in my back pocket to test that aspect. I wear 34x32 jeans and in my back pocket, it stuck out an extra half inch easily. There's no possible way I would be able to sit down with this in my back pocket, definitely not in my front pocket. I've gotten used to the N4 in my back pocket, so I'd probably get used to it.
It was the 16gb model and was $480 off contract. I did look at the Note3 while I was there, but that was definitely out of my league at $730 off contract. Don't get me wrong though, the Note3 was a very solid nice looking phone. I should also note that they did say they would not unlock it for me if bought off contract, I would have to call ATT corporate for that and even then no guarantee.
I was waiting for the N5, but I might just go this route if I can find one cheap enough.
Damn you gadgets!