well I have always dealt with and used mushkin, they used to anyway use hand picked infi.. chips on their modules.
There service is second to none and they stand behind every dimm they sell.
sp[eakign from usign there high performance lines only though, black label back in the day, now ddr2 high performance.
I just bought my first crucial memory the pc8500 i havent powered uo the system yet or dealt with the company much so I cant really compare them fairly, there well priced compared to the mushkin which made me nervous buying it over mushkin, but the ballistix seem to be very popular with overclockers and so I took a chance.
Lump