I am use lenovo ThinkPad T420. Lenovo ThinkPad has high definition HD Audio and good quality Display for Game. Lenovo ThinkPad is best Laptop for use office and home. I use everyday and enjoy high definition Display and HD sound. Lenovo ThinkPad T-series note book have long been the gold standred for main stream in office because of their strong performance, Superior build quality. The ThinkPad T420 battery life of this Laptop is 5 hours. So buy and Enjoy the ThinkPad.