Need another laptop

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The lenovo z50 has the advantage of space, more ram and a better wifi module. The g50 on the other hand has a better cpu and gpu. Based on the things you are doing, I would get the z series as you will be doing office work as the performance increase of the cpu of the g series is not worth it.
The Acer A10 will play games better then the Lenovo will. The Lenovo will do EVERYTHING else better.
The A10 is a weak CPU with a better then intel integrated graphics GPU.

For older games the intel grpahics will be just fine though.

The Lenovo is also better build quality over Lenovo.

What is your budget, should be able to find an i5 with at least a gt 840 chip in it for not much more.
 
The lenovo z50 has the advantage of space, more ram and a better wifi module. The g50 on the other hand has a better cpu and gpu. Based on the things you are doing, I would get the z series as you will be doing office work as the performance increase of the cpu of the g series is not worth it.
 
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