Really want an Xperia Z, they look like a great bit of kit, water resistant and good spec. But I've had 2 Xperia already, I haven't had anything other than SE since I got a K750i about 8 years ago! I was thinking of a change.
First Xperia was an x10i and I've had my Arc S for 15 months now. It's been a good phone, but the last update I did made it quite slow. I had to keep on top of the phone memory and delete the cache often. Something I imagine they've resolved. It just needs more internal memory.