the k850 was kinda rushed apprently, and had alot of problems because of it.
my past 4 of 5 phones have been sony ericsson, perhaps i dont keep phones for long enough for problems to occur lol, but my current phone has been great (w850i) it only crashed once, after almost exactly a year, and it wouldnt recover had to go away under warranty and most of the internals have been replaced now lol. but i love it. i dont plan on changing it any time soo i like it soo much which is unusual i dont usually keep phones for more than 6 months. And when i do change it'll probably be another SE.
Ive got a k800i, its a good phone and i bought it on whim, i thought it'd be a great spare/second phone. but ive hardly used it, at them oment its just a expensive alarm clock lol. i'm probably conna sell it once ive used up all the credit on the sim card.
I always wanted a w900 in black it looked brilliant, and was apprently a really great phone.