I can’t see risking the warranty (not to mention the time cost) for the $35 savings on the 16 GB upgrade. The 32 is more compelling.
Agree. Apple's upgrade pricing for 16gb is pretty reasonable. I know its not at all difficult to install after the fact, but at the very least, parting with that little extra cash makes the RAM all covered under Apple's warranty and not Corsair's or whoever you'd buy the RAM from. If however, you want/need 32gb of RAM, I'd only recommend going the DIY route. Apple charges $600 to go from 8 to 32gb. RAM of equivalent speeds are about $300. You could upgrade the base model Mini to the hex-core i7 & buy 32gb of RAM with the installation kit for the same price as Apple charges for the RAM upgrade alone. Crazy.