asrock b450 steel legend or msi tomahawk max

Going to build a completely new rig for gaming and streaming only. Won't Overclock it ever. Mobo: Asrock Steel Legend B450 CPU: Ryzen 7 3700x GPU: Gigabyte Geforce RTX 2070 Super Gaming OC 8G Memory: Corsair Vengeance RGB Pro 8x2 3200Mhz Storage: Corsair Force MP510 480GB M.2 PSU: Antec High...