The V8 is a waste ... tho not sure why you are comparing a $25 cooler and a $100 one
$25 - Hyper 212
$50 - Scythe Mugen Max
$65 - Phanteks PH-TC14-PE
$90 - Noctua NH-D15 / Cryorig R1 Ultimate
For 4.2 Ghz, Id use the Evo... for 4.5 Ghz, Iid use the Phanteks ... also from an aesthetics PoV, you can choose the color of the Phanteks cooler t match case system color scheme