I recently paid about $160 for Kingston RAM for my 2012 i7 Mac Mini Server that occasionally gets put into production duty, purchased from Amazon. Lifetime warranty, US made. I've been satisfied with Crucial RAM in the past, but the China-made RAM for the Mini was about the same price, so I went with Kingston. My opinion is that if it's made in China it should be so much cheaper than anything made in the US - I have a friend who works for Micron in Boise so I'll shop Crucial first every time, but there was no cost benefit there for me.
Two friends bought some cheaper RAM for their Macbooks last year with a lifetime warranty, but those companies went out of business. So, the warranty was for the lifetime of the business, not the RAM. One of them recently heard that "RAM Crash" sound, so he's shopping for some new RAM. Again. There's a Fry's about 15 miles from me, and they have brand names for electronics that sound like the ones I heard on 6th Ave in Manhattan near where I grew up - they really don't exist for more than a few months, and then they're gone.
Shop around, but pick a brand name that's been around for a while. RAM is RAM, until it craps out on you. Key point: keep the RAM that shipped with the Mac, since you can put it in when/if your new RAM craps out on you! I'll be going back to Kingston and Crucial for my next purchase.