The warranty period for recertified products is a max of 90 days for the most part. If companies have confidence in their recertification process, why the shorter-than-new warranty period? Just my opinion, but to me, that's taking a big chance, but it could pay off and on the other hand the thing might die after 3 months.
Even with the performance boost you'd get with a 570, I wouldn't return your current order for a chance on a recert.