My PC has been not functioning very well recently, and I want to replace it. However, I am hesitant because I have heard that some dental schools require you to buy a Mac. Are there a lot of dental schools that require you do that or just a few? I don't want to buy a PC, and then buy a new Mac next fall again. If I buy my new PC, I will definitely buy a good enough PC that I can use for at least 4-5 years without major upgrades.