Best Verizon Android Phone to Pick and Group Messaging

So basically long story short I am an iphone user sticking with Verizon only for unlimited data and want to pick an android phone, the only phone that doesn't appeal to me is the galaxy s4, anything else I'm open to. Any advice on what to pick would be great. Another part of my pick is will the stock text messaging app for each skin be able to group chat with imessage users? This is big factor for me in my decision buying so all help would appreciated!

UPDATE: I'm torn between the metallic blue htc one and the space gray iphone 5s.