OCZ's FlexXLC offers a lot to overclockers.  The 1150MHz out of the box speed will make sure that it isn't the memory holding back your FSB and 'ready for watercooling' design will give you some great cooling power.  PC Stats managed 5-5-5-15 @ 1220 MHz, and there is probably some room left to speed it up.

With DDR2 hitting speeds that high at a high price, and DDR3 hitting even higher speeds and prices, it is worth considering Ryan's article on whether DDR3 is really ready for the enthusiast market.

"OCZ has long been equipping its memory modules with fancy thermal solutions, partly to make them stand out on store

shelves, partially to address heat from overclocking and over-volting. In this review, OCZ brings to the table the

most hardcore form of memory cooling PCSTATS has ever seen commercially available. Watercooling for memory. Yup,

watercooling. OCZ's PC2-9200 FlexXLC Edition DDR2 memory runs in a dual channel configuration with a stock speed

rating of 1150 MHz, on timings of 5-5-5-18. "

Here are some more Memory articles from around the web:

  
Memory

• OCZ DDR2 PC2-6400 Vista Performance

  Platinum 4GB @ 3DXtreme

• Aeneon Xtune PC2-8500 CL5 1066MHz DDR2 RAM Kit @ Benchmark Reviews
• Super Talent W1866UX2G8

  DDR3-1866 Memory Review @ PCSTATS

• OCZ

  2x1GB PC3-12800 1600MHz Memory Kit Review @ Virtual-Hideout

• Mushkin XP2 PC2-8500 Ram Review @ Hardwarecanucks