The fact is, .ca domains are for a canadian audience. Most domains that would be decent in .com, are worthless in the .ca extension.
As for "rockband.ca", its "ok". I wouldn't register it. If I was going to register it, I would want "rockbands.ca" also. (WHICH IS AVAILABLE). But seriously, the domains by themselves are worthless. They would have to be developed to have any value.
I think if you want to discuss .ca domains, and not yours alone, this thread should be moved to another area.
RMF