Just my 2 cents, but before shelling out, think about what you really want from overclocking.
The extreme overclockers you meet in places like www.ABXZone.com don't run their machines at extreme speeds all day. It's just a game, like drag racing, and a very expensive one too.
If you are planning to overclock to gain extra speed with 24/7 stability, then you'll need to rein it in and seach for the sweet spot regarding bang for buck.
FWIW, I run an older P4 2.4b on an e7205 chipset at fsb 162 (2.9 near as dammit) day in day day out. Why? Because that's the highest I can go without having to increase voltages all round, suffer cooling hassles and lower memory timings significantly.
In my case, I'm overclocking largely as a money saver. I get nearly 90 per cent of the top end on the "b" series for +/- 33 per cent of the price.
Try to decide whether you fall into this bracket or are an out-and-out drag-racer, because each road will lead to different purcashing decisions.
Especially for memory. The extravagant claims and high prices around some brands are reminiscent of the hifi cables racket in the sense that you would be very hard put to notice the slightest difference in day to day operations, though of course you'd see a difference on benchmarks.