The best would be from LUGULAKE!
It's a powerbank (so it can charge truly wireless) but it can also charge like a normal Qi charger
Here's a good review of it:
Here are Amazon Links:
I personally have experience with the Samsung wireless charger for the S4 and it does help reduce wear on the micro USB at the bottom of the phone; I've had 2 office mates wreck their micro USB (Don't ask me how I really don't know what they did!) for some reason. The best part about wireless charging is that it charges as fast as plugging your phone to a USB 2.0. One thing you need to make sure is to buy a very thin charging receiver .5 mm or less so if your phone has NFC support it won't be affected. Getting those cheap knock -offs require some modding to the receiver for NFC to work properly.
As for your worry if it works for your M8, you're phone has to have the notches / small plugs for wireless (after doing a Google search, your phone does have wireless charging
) charging then you just need to buy the wireless receiver and a charging pad for it!Edited by mark_thaddeus - 6/9/14 at 6:06am