I recently ordered some of this high impact ABS in the 3mm roll(link below). I must say I am fully impressed with this filament. Little or no warping that I can detect. And it is very strong. Although it does bend if you give it a lot of pressure but then returns to its original shape. I haven’t actually break tested it yet…
I managed to print an entire roll of this stuff with only one extruder issue the entire time. The extruder grips it much better than regular filament. I was running the head at 250 degrees Celsius and pushes through very smoothly.
It costs about $85AUD a kg roll from 3dprintersuperstore.com.au
http://3dprintersuperstore.com.au/products/crystal-clear-high-impact-3mm-abs-3d-printer-filament