Multiple payment option?

Hey guys,

I'm currently waiting the iMac's refresh to get mine. I plan to buy it on apple.ca and to customize it a lot.

My problem is that my credit card limit is 3000$ and I will probably be over it (with taxes, etc.). Is it possible to add another card to finish the payment? I have the new Visa Debit card from RBC that is linked to my bank account so I could pay what is remaining with it but I don't know if I can use both when purchasing at the Canadian online Apple Store. Or maybe someone has a better idea that I could use to complete the payment?

And before someone says something like ''are you sure you can afford it? you're going to fill your credit card and be in dept'', yes, I have well over what I'm going to spend for this iMac.

Again, thanks a lot, folks.