Hard to go wrong with Crucial memory. It's sometimes a bit more expensive, but I don't think I've ever come across a dissatisfied Crucial customer.
I am looking for good memory and not some cheap, crappy memory. I was looking for some advice on this. Here are some specs to help out:
Processor: P4 3GHz
Motherboard: MSI Model MS-6788
Chipset: Intel i865P/PE/G/i848P
Memory Type: DDR-SDRAM 512MB
Channels #: Dual
Max Bandwidth: PC3200(200MHz)