Does cavirtex let you withdraw that much if you get some sort of level 2 authorization (like gox)? Didn't see anything on the site if you trade more than 10k month
From the transfer methods page linked at the bottom of the site.
Withdraw Canadian funds
You may withdraw with the follow methods.
Transfer type Delay Fees Daily Limit Monthly Limit Available
Direct Deposit (to your bank account) 1-2 business days $6 $3,000 $8,000 Now