i use a xiaomi mi3. i bought it a year ago, and it was flagship grade stuff for chips (~230€) then. my only complaint is the width of the body.
i used a sony xperia p before the mi3. software-wise, the worst phone i've ever had. sonys are usually nice, but almost every model has an annoying fuckup. e.g. the z3c offers great battery life, flagship performance, nice screen, but the camera overheats quickly and you simply cannot take pictures until it cools down. the z3 also tends to overheat so much than the glue holding the phone together melts and the back cover falls off. the xperia sl offered nice performance within its class, but after a couple of updates, it begun to lag like it had 512mb of ram. etc. so no sony for me until they come out with a phone without a major flaw.