jaslion :
bcknee :
Would it be worth it to get a 480 or higher to crossfire with my 470 or would it just bottleneck the higher end card?
You can't crossfire a rx 480 with a rx 470. Also crossfire has even worse support than sli which has next to no games that support it.
Multi gpu is almost dead for games so no worth investing in it.
You can crossfire RX470, RX480, RX570, and RX580, they are all the same GPU. Crossfire and SLI are definitely on the downturn for newer titles, though. Next to no games is not correct though. When considering it, you just have to look at your titles and see if they are supported.