My YPAO is quite accurate, all speakers correctly set to small, distance, level, etc. Though the crossover was never right, I agree on that. It sets the crossover to be 100Hz. That's why I've been saying many times, use the YPAO first, then make changes where appropriate.

Maybe you should leave the room? Your breathing too loud! No really, I read somewhere that if possible, leave the room, not really sure why.

Dude...you set the crossover at your amp setting. Read your manual. No need to mess up at the back of your amp

For example my speakers:

Front: 55–21,000 Hz
Center: 62-21,000 Hz
Surround: 65-21,000 Hz

So I set my crossover at 80hz and all my speakers to small so any frequency below that will go to my sub. I can also set my crossover at 60hz since my speakers can support that but that will stress them to their limit.

You can set your 9.4 to large if u want it to also handle those frequency below your crossover setting but why do you want to do that if you have a sub? A sub is meant to very efficiently handle those low frequency so let it do its job

If I were you I'd choose door to door. The thing is frickin' huge! Then there might be some customs paperwork involved as well. I'd rather pay extra for the convinience of having somebody handling everything then have it delivered to my doorstep

how come so much difference between door to door and door to airport.

it's your choice. this is what erik said about ultra when I asked him whether any significant different between pc+ and ultra:

That floorplan helps a lot.  Considering the size of the room and that you don’t listen at excessive levels (assuming that the level is correct but if the installer calibrated the system it should be) I think that the 2039PCPlus would be a great choice.  The Ultra is definitely a significantly better sub, it will be capable of more output and have a cleaner sound; but I don’t think you really require it.  If you tell us the complete shipping address I can do a shipping quote for you.