I recently purchased HTC One. A very beautiful phone yet powerful also. It is feature packed and has all the features of a flagship phone of this year. It has an Snapdragon 600 quad core processor packed with 2GB of RAM. The phone has a qHD display which is crisp and color representation is also good and vibrant yet tends to little warmer side. The speakers are loud.
The only problem is the battery which is only 2300mAh, which gives 3hrs of screen-on time and the processor also warms up with higher graphics intensive games. Overall, this is a well-built powerful phone which comes in a range of High end phone yet comfortable to pocket.