3rd party RAM for Mac Book Pro

My company will be bulk purchasing Apple hardware, specifically Mac Book Pros. We are looking into increasing the RAM from 4GB to 8GB, however, we have noticed that RAM purchased directly from Apple is exorbitantly expensive. For example, going from 4 to 8GB is an extra $1000.

My question: Is there trusted 3rd party RAM hardware that is proven to work reliably in Apple computers, specifically Mac Book Pros? And can you recommend a good vendor for that hardware?

I am inclined to go with a 3rd party RAM, and have our system administrators do the upgrade rather than paying the high price directly from Apple. But I want to avoid reliability problems with 3rd party RAM which would be expensive (due to wasted time and effort) for our company to resolve, down the road.

I've always liked Crucial. Guaranteed to work and all that. Good prices. Nice ram selector so you know your getting the right stuff.

In general any ram with the proper specs will work in a Mac. For new hardware though a guarantee is always nice.

Edit - I ALWAYS go with 3rd party ram in Macs. The prices Apple charges for ram is ridiculous.

Edit 2 -

I've never used them but I've heard good things about Mushkin. They are a bit cheaper and are currently the only 8GB Mac DDR3 kit on newegg.com. I've always found Neweggs egg ratings to be a good indicator and almost all of their rated hardware is 4-5 eggs (very good).

Crucial provide ram certified compatible with apple computers. but apple provide 4GB as 2x2GB and there is only 2 slots. So you will have to buy 2x4G and you will get a lots of useless 2GB memory. 2x4GB at crucial cost 900$. Generally mac resellers sells compatible ram such as Corsair, Dane-Elec and so on.. but in every case this will cost a lot.