If you want to take the hassle out of things, why not simply use Caibre as your eReader Library ? Calibre recognises all ereaders, handles transfers easily, and so simple and easy to use even Mr. TechDunces like me can use it without any problems ....................
I've never found I absolutely HAVE to get a particular book instantly, and rarely if ever buy wifi-ly via any of my readers, and have never quite understood the huge "advantage" this supposedly confers.
And, of course, should one really wish to expand one's reading horizons, there's always Alfie to call on .........