i still have the xperia 1 and love it, most amazing phone i've ever had by far. i was thinking of upgrading to the 1 iii when it dropped to $900 but i heard it had some serious overheating issues, then i considered the 1 iv when the price just dropped, but it sounds like it overheats worse than the iii. now i gotta wait for the v to see if they can finally solve this.
honestly the 1 still works like new and does everything i need it to fine, so i could easily use this phone for a few more years until the price on the v drops a bit, i just hope they work out the problems and it's worth the wait. based on my experience with the xperia 1, i really want to stick with sony. i had a galaxy before this and it was pretty good while it lasted, but it didn't last nearly as long as my sony, this phone feels like it's built to last for a long time.