1080 TI FE not buyable, 1070 TI FE on the rise

Hi hashkittens,

I was trying to build my own cracking rig, but I noticed that it's not easy to get the right GPUs.
Yes, I live behind the moon and so I did not notice all these cries about out of stock GPUs.
Can somebody tell me what the actual situation is right now?

Are there GTX 1080TI Founders editions coming back to stock or are they really out of stock for good?
Will there be any successor in the near future?
Should one wait for a successor or just buy GTX 1070 TI FE in the mean time?
Would it be better to buy a non-FE GTX 1080 TI or a GTX 1070 TI FE?
Would it be better to buy a non-FE and non-TI 1080 or a GTX 1070 TI FE?

So to sum up...in what order can the "attributes" of the card be placed regarding priority to build a hash cracker?
1080 vs 1070?
FE vs non-FE?
TI vs non-TI?

Thanks,
golb