What's more important with RAM memory: fast timings or higher clockspeeds?

"I would lean toward the one with the higher frequency being faster but generally they will be nearly identical in speed.

for example the

800mhz /12 is 66.66 cycles
1000mhz /15 is 66.66 cycles

800/4 = 200 cycles
1000/5 = 200 cycles

so you can see they should be close to the same speed although in my experience the higher mhz is more flexible with overclocking"