[pyro-manic]

Strange. How is your arm placed when you're using the mouse? Is your forearm resting on the desk, or is it off the surface? My arm hardly moves at all. I move the mouse primarily with my fingers, and my wrist pivots a bit, but not much more than that. My arm and shoulder are relaxed most of the time.

Oh well - whatever works best for you, I suppose. I only know I hate using trackballs. And those touchpads on laptops, for that matter...

[Descenterace]

the high timings generally negate the effect of the bandwidth, so the G.Skill 2-3-2 sticks for the same price may be a better option.

Not entirely accurate. Latency is an issue when doing many small reads, but that's why CPUs have cache. When transferring large blocks of data (the main issue in games) bandwidth is king.

[CP5670]

These benchmarks show that a somewhat lower bandwidth combined with lower timings are the fastest combination on a single core (I'm comparing the 2.5-2-2 at 237mhz and 3-4-3 at 290mhz benchmarks):
http://forums.anandtech.com/messageview.aspx?catid=28&threadid=1475190&enterthread=y

It may be different for dual cores though; I'm not sure whether those prefer bandwidth or latency.

[Descenterace]

IIRC, AMD64s generally prefer bandwidth (up to a point), especially those with larger L2 caches. Can't remember how the X2s differ.