I have just invested a lot of hard-earned cash on a new MacMini and now attention turned to a display. I would appreciate some advice please. I am after something that is at least as good as my 'old' 2014 27" iMac display. I will use it for analysing trading data (so lots of numbers / graphs etc) and also for streaming 4k video and web conferencing for work. I am happy to get external speakers and webcam if the monitor doesn't include that. Thanks for helping out.