I am in the final stages of choosing which new computer to buy. I am between a few, either a laptop or a Mini. The model I am considering is an i7 with the upgraded processor. I am considering the 1 tb fusion drive and 16 gb of ram. One place I am seeing as the most likely to save money is the ram upgrade. I am seeing 16gb of ram online for under $100 but to upgrade it in the mac store its +$300. Does swapping out for 3rd party ram void your warranty? I see in the forums most people are talking about doing this themselves. Any tricks to getting a better deal on these things ?