Okay, here is my first impression after some more gaming:
(First of all a tip: you can actually switch between a ps3 and an xbox 360 joystick driver!!)
If Jesus Christ had been a gaming handheld, this would be the second coming of the lord. It's that good. Seriously.
Emulator performance is great (and screen refresh rate very close to 60 - 59.21 for those who really mind)
Ergonomics are great!
I just watched an episode of wizard barristers and omg it looks so freaking good. Really very very good. And bright. I test at the window and couldn't even see the sunlight reflect in it. at all. It also sounds great - those speakers are really really good.
All the controls werk superbly well. This includes the dpad and it's diagonals.
Wifi is good (constant 16-20 mbps download, 18 mbps upload)
It's built like a tank. And no more hinge sound. And looks good.
preliminary rating: ten get-wrecked new 3ds XL's / 10.
Will post my experience with modern combat 4 when it finishes downloading in a few minutes.
And then san andreas. And gamestreaming. OMG!