I've owned T5xx and T4xx in the same timeframe, they're also high quality. Im not sure the X1 Extreme is part of the biz line... it's marketed at gaming or mor

I've owned T5xx and T4xx in the same timeframe, they're also high quality. Im not sure the X1 Extreme is part of the biz line... it's marketed at gaming or more accurately people that want a Work/Play device.