Wrong fee on transaction
There is no correct fee for sending BTC to mtgox, and you can send to the same address. MtGox doesn't get the fee. MtGox only requires a number of confirmations. If you added a fee at all then there should be no extraordinary delay. A fee-related delay is for the first confirmation. The age of your source account(s) can make more difference than a fee. Just relax. The first time is painful to wait for. 


  
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I don't know how you can send a ">10000 byte" transaction to mtgox unless you are talking about the bytes of a raw transaction rather than a bitcoin amount. In that case, you should be able to figure this out. Send the same amount again from same addresses but with a higher fee. It is a double-spend and the network may take the second first while leaving the first to be discovered invalid.