You might get 2.5-3-3-7 @ 200MHz but theres no guarantee... I doubt 180 v 200 would give you much difference in achievable timings tho and any performance difference would be less than 1%... main thing is to get the CAS latency off 3 if possible, the difference between 2 and 2.5 again isn't huge and you'd prolly have to drop down to about 150 to get to 2, but both 2 and 2.5 should give quite a bit better performance than 3...
as always test rigourously with memtest86+
could you tell us exactly what modules these are? I'm assuming from the SPD that they are Kingston PC3200 value RAM... but possible its high performance stuff with a loose SPD for compatibility... if it was hyper-x stuff they give lovely overclocks, if its value ram its a different story some will OC quite well and others won't even go 5MHz or less than 3-3-3-8 @ 200MHz.