What Ginsue said, you guys have an amazing amount of knowledge !
Update:
Got a Netgear gig switch, works great.
Went with a new Xfinity package to reduce my current bill.
Have the Xfinity cable modem (Cisco DPC3914T) and am working on modem placement in the house for decent Wifi everywhere.
I'm using a Wifi Analyzer on my phone to track the signal, so far so good.