I would not use bitinstant, there is a 33% chance your order will fail, with me its 1 out of 2 orders that failed, see http://i.imgur.com/l9Z9l5Y.png found on http://www.reddit.com/r/Bitcoin/comments/1c6ppv/survey_how_did_bitinstant_worked_out_for_you/. If the order fails, you will be without your money for weeks, so it's definitely not instant in a lot of cases. Still waiting for my money :-(