I own Laptops, Ipad, Android Tablet and desktop but the best mobile solution I own is my Ultrabook class machine. Mine is a Zenbook but all of the main manufacturers offer Ultrabooks.
Ultrabooks are thin laptops and can be had with with real Intel processors. I have an I7 low power variant so it is supper fast. They also mostly come with Solid State Drives (SSD) but watch out for some of the cheaper ones which may have eMMC drives as they are nothing more than an SD card soldered to the motherboard. They are gaining popularity with the less expensive computers but eMMC storage can’t compete with an SSD for speed or reliability.
My Zenbook lasts for about 8 hours on a battery charge. Is at the "Welcome Screen" in less that 2 seconds and is as powerful as I need, which is pretty powerful with the I7.