mmm I need to bug you all again with another question :]

if I buy a Comcast HD box from ebay, do you all think that I will be able to watch the HD channels from 800 to 900 ? ... cause right now with the small box, when I turn to say 852 (52 is history channel) it says HISHD in the info bar; at 853 it says MTVHD .... and I can hear the sound only but no picture. So I would think that the signal gets to my appartment but the box just cant dispay the picture.

or maybe that is connected somehow to the particular box that I have, like with the card/board that is plugged at the back of the box.

I mean spending like 60 bux for HD box from ebay sounds much better than paying 11/month extra :]