ADSL is to do with the modem for the normal phone line broadband. Looks like you have cable. Yes it's a nightmare trying to pick out the router that's suitable, so much to check. Not least of whch whether it is compatible with wireless cards you have in other boxes. I could do with a ADSL one myself; using my fixed line router/modem at the moment.
Free from Virgin is nice, but you get more choice choosing your own. Without wondering if the service supplier has added facilities to their equipment for their own benefit.