I've never used Kingmax, but I remembered a good review Agg of Overclockers Australia did some time back comparing two kinds of Kinmax to Corsair CAS2. Find it at:
<A HREF="http://www.overclockers.com.au/techstuff/r_kingmax/" target="_new">http://www.overclockers.com.au/techstuff/r_kingmax/</A>
I only re-read the conclusion that that the Corsair CAS2 is faster, but much more expensive (at the time of the article).
You can also find various memory reviews at places like:
<A HREF="http://www.anandtech.com" target="_new">http://www.anandtech.com</A>
<A HREF="http://www.techwatch.com.au" target="_new">http://www.techwatch.com.au</A>
<A HREF="http://www.overclockin.com" target="_new">http://www.overclockin.com</A>
<A HREF="http://www.extremeoverclocking.com" target="_new">http://www.extremeoverclocking.com</A>
<A HREF="http://www.lostcircuits.com" target="_new">http://www.lostcircuits.com</A>
I current use a couple of types, but the best seeems to be the Mushkin High Performance rev. 2. This looks like some of the most overclockable RAM out there and currently sells for US$139.00 for a 128meg DIMM or US$266.00 for two DIMMS.
<A HREF="http://www.mushkin.com" target="_new">http://www.mushkin.com</A>
Memory Man also sells many different types of RAM, some cheap, but some very good stuff:
<A HREF="http://www.memman.com" target="_new">http://www.memman.com</A>
Of course, I'm in the USA and I'm not sure where you live. If not in the US, I presume that shipping/tax could play a major role in your choice.
I'd check out all the sites I listed above. As a whole, they cover most of the current high-end choices
Mike