Definitely headed in the right direction with the brand and the specs. But price seems a bit off. Then again I would never buy a laptop from Best Buy either.
For the same price, you can get an
equivalent model that has a bit more punch in the graphics dept. (2GB GeForce Video Card) which AutoCAD will appreciate. I've heard of PowerSKM but never used it so I don't know what the system requirements are. If there are any graphic intense operations, again the supplemental graphics will come in handy. The i5 should be sufficient as will the 8GB of memory. Which can always be increased to 16GB I imagine. Not sure how well versed you are with drive imaging, but for a minimal cost adder, I'd also drop in a solid state drive (SSD). Something like the Samsung EVO 120GB. But first I would go to the ASUS website to see if either laptop has dual HDD bays. That would be ideal because you could have the SSD as your operating system drive and then a 2nd drive for storage. That's how I have my ASUS laptop set up and it is pretty slick. HTH.
EDIT: Laptops are definitely trending toward touchscreens, but if you are going to use it as a workstation, it really isn't practical. They do work pretty nice with Windows 8/8.1. But from my experience, more on the multi-media front (i.e. you won't be using a touchscreen in conjunction with a CAD program...LOL).