Some cable companies will offer a cut on the monthly rate if you buy a cable modem. The following guidelines will help you make the decision about which way to go. Your cable company does support the modem. The cable company promises that the modem will be usable long enough to make the purchase worth while. You are planning to stay within the area of your current cable operator.
Many companies do still use proprietary modems.
Don't get a modem that is not supported by your cable company. Experience so far has shown that most cable modem companies have a tendency t blame everything but themselves for problems. Noise and bad lines are quite common and a pain to fix for the cable operator. It may be an easy escape route for them to blame the modem. You can always swap a rented modem.