Trust me, you won't get the best deal unless you threaten to cancel your service. Yes, Syfy, that includes Vivid..
The contract phone bank operators SXM uses has a list of offers available in case someone is calling to cancel. If you're willing to spend a couple minutes on the phone with someone (from Indonesia or India), they will make you a much better offer vs. losing you permanently.
Two months ago one of my vehicles with SXM got totaled when a semi jackknifed into me. I called SXM to cancel the subscription for that totaled car, and the operator was pulling out all the stops with offers to keep that account. Finally I said; 'look, the car with that radio was destroyed, so I don't want to pay for a subscription on a car that I don't own anymore.' Eventually the operator got it, but prior to, must have read-off five different lower-priced options.