High FSB Clock AMD Boards

I have a M4A785D-M Pro which tops out @ around 305FSB. High stock multi chips or BE chips (overclocking wise) it isn't a problem, but any chip below 3Ghz stock i'd be hard pushed to get past 4.3Ghz (unstable). I'm aware the top 790FX boards like the UD5P can and also the lesser UD4P, but i was wondering if any cheap boards can do this? AM2 or AM3 boards. My board was £60 and got to 300, are there any others that cheap that can go higher on the BUS?