Seems I'm a little late to put my input in here, but I'm going to do it anyway. Since I work at Mircon, I would recommend
Crucial. Maybe because I know how they work around here and I trust them. Also a big reason is because I get an employee discount.
I've recently started reading up on their Ballistix Memory. Looks pretty sweet if you are into PC gaming. I think thats the memory I'm going to get for my next computer... if they keep producing it. Here is their website if you want to read up on it and get your own opinion on it.
Ballistix