Best modem / wifi to purchase

So I am a long tome Xfinity/Comcast customer (29 years same home), and my Jan bill literally has gone to $279 for tripple play.  Beyond upset and beyond my budget.  I plan to go into store and readjust my plans and equipment, taking whatever contract they offer.  I am seriously considering just purchasing my own modem / wifi devise and stop the rental one.  I plan to drop my home line as well.  Any recommendations on what I would be happy with as a router / wifi combo.  I currently use Comcast top line, with like 600mb down, but seriously, my kids are now moved out and I need no-where near this for my basic surfing, occasional Netflix.  Any advise is welcomed, thanks