Which one of theses laptops should i get?

If they are the same price, then I would go for the i7 DELL lots of storage & largest screen. If the bulkiness of the DELL is an issue then the second choice would be the the Lenovo. The touch screen, you are paying for the TOUCH & not necessarily performance.

R9 is best GPU on most games. GT 750M does better on a few, but the R9 is better overall.
http://www.notebookcheck.net/...&daysold=0

i5 http://www.newegg.com/...0Core%20i5
i7 http://www.newegg.com/...0Core%20i7

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I would avoid the two Acers here as they get pretty damn hot while gaming or CPU heavy tasks… Your best options are the Dell and Lenovo for the following reasons:
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1. The GT 840M in the Dell is comparable in performance to the GT 750M in the Acer models but consumes less power and generates less heat overall… The Radeon in the Lenovo is not as energy efficient as the Nvidia GPUs but it is slightly more powerful (repeat - only slightly)…
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2. The i7 dual core ULV models in the Dell and Lenovo are a tad more powerful than the i5 dual core ULV CPUs in the Acer models…
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3. Dell and Lenovo offer better customer care than Acer…
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NOTE: Try and look for a Dell with the same specs but in 15.6 inch or 14 inch if the 17.3 incher is too bulky for you… If not, then just get the Lenovo one… Lenovo Ideapads such as from that range are known for their good quality of build and excellent overall performance…