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I'd recommend the second ones if you don't plan on tightening the timings on the first one
i would personally go for these: http://www.overclockers.co.uk/showproduct.php?prodid=MY-054-TG&groupid=701&catid=8&subcat=2429
i would personally go for these: http://www.overclockers.co.uk/showproduct.php?prodid=MY-054-TG&groupid=701&catid=8&subcat=2429