I finally decided to go with the HTC M8. My reasons are not going to be everyones. Motorola makes the best radios. Well, possibly Blackberry is somewhat better, but not much. But the HTC radios are also pretty good. Boom sound is pointless if you ask me., At best, the phone sounds like a good 1970s transistor radio. The Moto sounds a little worse, but really who cares? The new X build quality is right up there with the M8. I am not a real fan of metalwork bodies - I prefer a well done plastic body. If you want to see a plastic body done right, go look at the Lumia Icon! But Moto decided they had to go with fashion over function. Which is OK - they did a good job of it. Earpiece sound (you know, for phone calls) is good on both phones. They are both comfortable in the hand, Everyone whines about how slippery the M8 is, but that's just overblown to give bloggers a nit to pick. It's not bad at all and if you get something like a Diztronic TPU case it's a complete non-issue. So, why did I choose the M8 over the X? The deciding factor was the display. My use for the phone is twofold - I call, and I read. LED/AMOLED displays are fine, and Moto makes good use of it with the notifications. But the LCD on the M8 is far easier on the eyes if you are reading as much as I do. I know there are companies like Samsung that allow you to adjust LED saturation, but it's really not as good even when given that control. I am not sure what it is, but I find LCD more comfortable to look at for a long time. So that was my decider. If you are not going to spend hours staring at the screen the LED display may be the way to go just for the clever on screen notifiers. In that case case the Moto may be the better pick. Truly they are both very fine phones and it's going to come down to what you use it for and how you like it in your hand. You won't find your answers here - you will have to look at them for yourself.