The lenovo is the best of them.
it has a 1900x900 resolution screen (1366x768 is unusable, which is the normal laptop resolution for 15.6" and under laptops, except the $800+ ones)
it has a full speed core i5 (the others have the U model cpus, which are ultra-low voltage. So they run at low speeds, but do give it much better battery life).
i suggest buying a 4GB stick of ram that matches the one in your laptop. That way you will have 8GB of ram in dual channel. (requires 2 matching sticks. But brand doesn't have to match).
this drastically increases memory bandwidth, which will improve your integrated graphics performance.
may want to get a laptop cooler aswell, so the laptop is able to hit higher turbo speeds for cpu and igpu.
touch screens are just gimmicks.
they are not nearly as accurate/responsive as most touch screens on smart phones.
you are better off buying a wacom drawing tablet if you want a touch like functionality.