Interested in buying my own modem - Time Warner Internet

This question is about "Interested in buying my own modem", with Time Warner Cable internet and apps. Currently the highest speeds in my area (SE Wisconsin) are 50mbps. Supposedly we are getting upgraded to 300mbps soon (anyone know when?)

What is the most reliable 300 mbps 16x4 modem I can buy that will also work well with my current 50mbps speed? I work from home and depend on consistently reliable internet. I want a modem that has firmware that has not been found to be buggy.

Also I am not interested in a modem router combo. I want to buy a separate router, so I would appreciate recommendations for that as well.

This topic covered Interested in buying my own modem, and TWC cable internet service.