Looking for two pieces of 512mb RAM for my Inspiron 5150 as well.
I, too, used to buy exclusively from Crucial.com (512 mb now at $64 shipped).
In this thread, the reliability of Kingmax RAM seems to be confirmed. Compared to Crucial's RAM, does Kingmax's offer the same speed? Can anyone advise? If Kingmax is slow, for $20 more, guess I will still get from Crucial.