Oh, and one more. The N8x0 devices have 16bit screens, while the Archos/PSP/iPod/iPhone have 32bit screens. The difference in quality exists, and I was painfully made aware of it the other night, when I was designing a theme for the N800/N810. All the gradients looked terrible because the screen didn't have enough colors to display everything. So basically, if the reason you buy a gadget is very visual (e.g. watching video), definitely go for a device with a good screen.

I still use my N8x0 devices for internet tasks when I am away, but each to its own, so I use each of my gadgets to do the thing it was designed for only.