I would say look into the newer Corsair AIOs if you wanted one of those or look at EK fluid gaming if you wanted something more custom, Noctua makes good air coolers
GPU wise, I would say try and find something close to MSRP and whatever you can find buy that otherwise wait until prices drop
monitor of that spec is going to be expensive regardless, A monitor like this might be a good option with an AMD GPU and as long as you don't care about G-sync if you were to switch