@jalefkowit if they're all equivalent I would just get another cobo, since then it's got my library already on it, plus they were originally Canadian before they were bought out by a Japanese conglomerate
If you use Calibre for your library (which you definitely should) then which ereader you use is not a problem (as long as it's not the Swindle, of course).
@Canageek That's probably what I would do too, yeah. Never heard any bad things about Kobo.