<< I wish someone would answer that Q for me to -- I do not want to spend the extra $40 for no reason on my cheap Dell Computer I just bought. >>
If your not looking to overclock (in which case, depending on the o'cing method, you would need PC2100+ (i.e. PC2700), the only real differences (aside from registered/unbuffered & ECC/non-parity) are the timings. Crucial DDR is CL 2.5, while some of the higher-end and more expensive RAM is 2. The cheaper stuff you are looking at could be higher. Anyway, my Crucial has been running at CL 2 for months without any problems.