Hi. Welcome to the board. The choices you're looking at are good ones from what I hear. The only one I can recommend from personal experience is the Meizu M6 which is an excellent player. I use it both for music and video and am very satisfied with the quality of both.
The best advice I can give you as far as purchasing any player is to choose your seller carefully. I would recommend avoiding eBay altogther.
UXCell, House of DAP, MP4Nation, and JTC Electronics are all trusted sellers. Many posters from this board have bought from them. I purchased my Meizu from JTC Electronics and it was very reasonably priced and shipped quickly.
Hope this helps!
