For those who are not sure what phone to get here is a cnet video testing the physical building of the HTC m8, the gs5, nexus 5 and iPhone 5.
http://www.cnet.com/news/galaxy-s5-bests-nexus-5-iphone-5s-htc-one-m8-in-torture-gauntlet/?ttag=fbwl
http://www.cnet.com/news/galaxy-s5-bests-nexus-5-iphone-5s-htc-one-m8-in-torture-gauntlet/?ttag=fbwl