With the 1080 being out, and the 1080 custom cards being RIGHT around the corner, it's no contest.
Wait for either the 1080 custom cards, the 1070, or the 1070 custom cards if you're feeling extra patient.
IMPORTANT NOTE: The preorders and actual sales sell out very quickly. So if you want anything asap, be sure to be up date with the release times.
PS: I highly recommend getting a custom card, as they are better than the founders card in every way, while also being cheaper.