Went With Crucial a year ago for my Intel Mini...
It has worked great, so I just bought 4gb for my MBP last night from them.
New Egg is reputable, but I'd be careful of what BRAND of ram you get from them. I've heard some "iffy" things about various "Cheap" ram, but Crucial seems to have a pretty strong standing and like I said, I personally have had no issues with my mac mini ram... (except for 2gb just not being enough for everything I'm throwing at it right now... thus it's being replaced with an imac... scooped up a refurb 24" 2.8ghz last night😀)