Permabanned
You could go with an i7 and a 1070 but it might be a good move to get on a newer platform and sell the bits you have while they're still sellable for more than tuppence, It's not like you're doing an upgrade for the hell, because you're bored. As I just read mentioned the 1070 isn't a spring chicken now so it'll be worth leaving the gpu upgrade a little longer to see what else turns up on the market.