Hi, I'm an amateur photographer and was looking into mirrorless cameras. The reviews and price were great for the sony a6000, so I bought an open box on best buy today. I'm not sure if I made the best decision... - is $600 total worth it for an open-box best buy a6000? - are there are other affordable mirrorless cameras that are better? Please reply asap - I am going on a trip to Cuba next week and would like to make a purchase ASAP. Thanks.