AM3+ CPUs clock easier with decent RAM when aiming for top clocks, as you will get less memory errors.
I would probably grab something like this:
http://www.overclockers.co.uk/showproduct.php?prodid=MY-032-TG&groupid=701&catid=8&subcat=1387
Then when it comes to clocking, reduce the RAM multiplier to the lowest and go up in CPU bus until you reach the CPU overclock you are after, adjusting voltages accordingly (you can throw the RAM voltage on 1.65 straight off and remember, more cpu/nb voltage is required for some of the high bus clocks but too much will cause instability as much as too little). Then change the RAM multiplier to the highest it can go without going too far over its original speed (2400Mhz in this case). Check if it is stable, if not, you can risk either upping RAM voltage (not much to be gained after 1.65 imo), loosening RAM timings, lowering RAM multiplier or lowering the CPU bus clock, until you find it stable with a half decent RAM speed (even if it is lower than the 2400 at cas10 like it is at stock).
After you got that far, just some fine tuning to get the most out of your CPU/RAM. Play with timings to see if you can tighten them. I would prefer much tighter timings at 1600 or 1866 on these chips over loose 2400/2666 timings. The CPU clock can normally go a fair bit higher with a mixture of multiplier and bus clock by reducing your bus clock a bit after finding its max bus only overclock and then upping the multiplier. Reducing bus clock will also reduce RAM speed and make it more stable/slower, you can choose to do this to gain stability while maximising CPU clock or use this to lower the RAM speed so that the multiplier can be increased on the RAM to closer reach the original stock speed of the RAM, if it has fallen short or even gain a higher speed if your RAM and chip allows for it.
This is just how i normally do things, i am sure a few people out there have different and better methods but this is what i use to clock CPU and RAM together for fx chips. I'll admit now, that i am far from an expert

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Patience is the key to finding the perfect clock.
The PSU OverKill has specced is the one i use and is a monster PSU, my top recommendation for a heavily overclocked 290 Crossfire, 8320 rig.