I'm using a ASUS M5A99 FX Pro 2.0 with the same CPU and I run @ 4400MHz for a daily OC with no problems (stock voltage) , and I've had it to 4600 + MHz with minor voltage tweaks. Sabertooth would definitely be a stouter board for serious OC'ing , but it's pricier. My board has lots of features , including DIGI + voltage control , but the lower price is reflected in the components. I would rate my mobo as 'good' , but the Sabertooth is 'gooder' if you want to go higher. As always , YMMV depending on your needs and budget.
As a side note , I love my FX 6350/M5A99 combo. I can go from power saving modes that barely use 3 cores at below 3000 MHz to my 24/7 6 core , 4400 MHz set up. And it was under $250.