A:AnswerIt depends on your needs. I needed a monitor to connect two HDMI sources, so I chose the LG - 24" IPS LED FHD FreeSync Monitor. It's the basically the same specs and the same price with a higher refresh rate. See it here: https://www.bestbuy.com/site/lg-24-ips-led-fhd-freesync-monitor-black/5770302.p?skuId=5770302
Good Luck...
A:AnswerYou only need to connect a GPU but you are correct, most will recommend a higher PSU. Do note that the recommended PSU is often the overall PSU size, not an additional amount of watts required.
A:AnswerThis model is not designed to be transferred into a different case as it uses a custom motherboard. It is possible that you may be able to fit it in an ATX case but you would lose the front ports.