You could use a Disk Imaging program like Acronis True Image and be done in very little time. I create a disk image of my PC all the time and have had to restore a few times.

The big reason with a new machine I would not do this myself is "crud" all of the detritus from your old machine will be copied to the image. I would definitely say if you are inclined to a disk image clean up the old machine well first. On the other hand reinstalling you apps may be laborious but gives you a "clean" install.

Lenovo's were corporate standard at my last position, so I have imaged hundreds of these with very few issues. So you might even with a clean install elect to routinely image the new PC