The cheapest X1300 is R900 (its powercolor, maybe they have improved, but I didn't have good experiences with them a few years back) so if you have that extra R100, its a good option, and next up from that is a Asus for R1070, both of which I can also get.
I was just informing those that like nVidia (maybe for better lunix drivers), I'm neutral on these two graphics chipset companies, except that Intels/SiS/Via graphics sucks
Or get a X300 and overclock it so it runs faster than the X1300. I am running my Powercolor X300 PCI-E OC'ed and its stable and fast, amazingly OC-able GFX card