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Geil Black Dragon DDR2 2x1GB 800MHz CL4 74???
I assume "74" is the price.
I'd go for any of them, and select by choosing the ones
that:
a) are lowest manufacturer suggested voltage to operate at full speed
i.e. 1.8V is better than 2.0V.
b) Have fastest timings at full speed 4-4-4-12 better than 5-5-5-15 better than 5-5-5-18
better than 6-6-6-24.
That being said I'd look for good deals if I could find PC2-6400 memory that
runs 5-5-5-15 or faster cheaper. Yesterday I saw Fry's and Clubit had
OCZ 2x1GB kits for like $35-$39 final price, though I'm not a fan of OCZ especially
only because usually they run at higher voltages for the same speeds you can
get out of other products without extra voltage.
In your list the Patriots look fine if they're the cheapest and have comparable
timings and lower or same voltages as the rest.