Few random thoughts (I'm american, my wife is not).
Uniqlo (since you mentioned it, I'm wearing a heattech shirt right now) sizes are different in the US than Asia. I'm an XL in asia, and a L in the US, they're exactly the same other than the label.
Immigration paperwork: we never used a lawyer. No need to, as long as you're very, and I mean very, good at following directions and paying attention to details. Our experience was always smooth with immigration, the interview took about 5 minutes. He asked how we met, and then he told us stories about his grandkids for the rest of the time. I think it helps a lot if you "look" like a plausible real couple (which you definitely do judging by that adorable profile picture!)
Food: the best thing about Asia is that it's possible to buy food that's cheap and healthy. In the US, you have to choose 1 of the 2. Not much of an issue if you're cooking at home, but any time you're out, it's impossible to eat healthy and cheap in this country. That said, Memphis is terrific food city. Payne's BBQ is one of my all-time favorites. As is Cozy Corner, although last time I went through it had burned to the ground.
Don't worry about the climate as much as you think. Winter comes on gradually, and you adjust over time. Flying straight from Manila to December in the US is rough, but when it comes on gradually your body and soul adjust and it's not that bad.
Good Luck with Everything!