No i3 6100 is compared to a Fx 6300
fx 8350 has about a mid intel i5 speed
try to get the wraith cooler with this cpu , (almost performing equal to aftermarket coolers)
If you want cheapest (i won't recommend overclocking) get a gigabyte ga-78lmt-usb3 or if you have little more money go for asus m5a97 models
The gigabyte board is a good board if you don't want to overclock, it is also one and only 760g board having 3 heatsinks , so no thermal throttling at stock speeds.