Glad you appreciate the Lenovos too, they are the most Linux friendly to my experience!
The one you have found is very interesting: powerful, classy and windows free!!!
After a brief research I made in the net I found it is very quiet and cool, it has nice keyboard
and many other benefits. The only cons are the slow HDD, the weak battery (in case you are
planning to use it outdoors) and the screen color accuracy that can be improved too.
If I was you and really needed it, I would go for it running, but if your Acer still gets the job
done and you have two more Lenovos waiting I would wait a bit more!!!