>>2915923XLR adapters are a more solid connection and they can give phantom power, which enables you to connect way more powerful microphones. But it also means that the recording device will suck more power. Not all XLR microphones require phan tom power though. SO you can get a 3,5-XLR adapters and use them even on your phone.
When buying a recorder with XLR ports you should look into the "cross-shaped" ones like the h4n has. they can still take a 6.35mm connector, so you still have the option of using the more commong plugs.