<< stay with crucial if you don't know what you need.
256mb Mushkin Basic PC2100 $ 34
this one is nothing special, better to get Crucial PC2100 cl2.5 for same price.
256mb PC2400 DDR SDRAM $ 62
this one is for overclocker, if you want the memory guaranteed to be able to run at 150Mhz.
256MB PC2100 DDR SDRAM w/ Hyundai (Hynix) chips $ 65
this one is nothing special, just for sure Hyundai chips on it, you can almost buy two Crucial PC2100 cl2.5 for at this price. (Crucial is Micron, Micron is US ram, Hyundai is Korean ram, they're both good in ram, draw game)
256MB PC2100 DDR SDRAM SPECIAL $ 64
diito
256MB High Performance DDR SDRAM 222 $ 122
this one has the lowest latency, the performance difference in 0.5 cas latency doesn't justify the huge price difference. for this price, you can almost buy four Crucial PC2100 cl2.5. >>
Good advice. BTW, everybody runs Crucial at 2-2-2 with no difficulty, and mine is running at a FSB of 145 at 2-2-2 with no problems at all.