Nope, stick with FX 6300, the added Mhz in 6350 gets neutralized by mild OCing, it's not worth the extra money. For MoBo, I'd go for MSI 970 Gaming, the only MoBo in your budget with SLI support, 6+2 power phases are great, good for your CPU:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130790
Or GB 970A-UD3P if budget is a bit tight, no SLI support but still great for OCing.
On a side note, I'd go for i3 over FX 6, the AM3+ platform is dead, and i3 wins in 99% games anyways.