So many of Them - First it Depends on your budgets- second it depends on What purpose you are buying your PC. their are lots of motherboard in market available now. what software,game to use in your pc that’s matter . i search in google their are lots of good motherboards i found one of them is MSI Z270 Gaming Pro Carbon. It pretty good motherboard for gaming.
Supports DDR4-3866+(OC) Memory
DDR4 Boost with Steel Armor: Give your DDR4 memory a performance boost
VR Ready and VR Boost: Best virtual reality game experience without latency, reduces motion sickness
Mystic Light and Mystic Light Sync: 16.8 milliom colors /17 effects controlled in one click with GAMING APP or mobile devices.
Lightning Fast Game experience: Twin Turbo M.2, Steel Armor, M.2 Shield. Intel Optane Memory Ready, Lightning USB 3.1 Gen2
Read More : https://www.techallnews.com/best-motherboard-for-i7/