I don't know about current quality, but my Motorola Surfboard is seven years old and going strong. I purchased it after the one my cable company supplied bit the dust. As Harold said, you just need to supply the new MAC address, which, depending on your cable company's phone system, can be a five minute or a two hour job.
I'm running a Cradlepoint router, mostly for the redundancy of being able to use the 4G feature if cable goes out, but also because they have some decent configuration capability.