If you don't like comparing the specs you might find it easier to check with manufacturer sales websites. For instance,
Micron (crucial) and
Kingston are both good about guiding your purchase based on computer model instead of spec. Buy there, or use the specs you find from their site to do more comparison shopping.
Even the RAM manufacturers sometimes list incorrect parts, usually early in a product cycle, but if you compare a few sites against Apple techinfo you'll quickly find the correct common spec and best price. In my experience, both Kingston and Crucial have excellent warranty and general customer service so you can't go very wrong.
As for the Mushkin memory I mentioned earlier, yep, works great. (Mushkin is rarely a bad choice.) Of course my experience with these sticks is limited to this now obsolete c2d MBP.