I use two blade rage but am not 100% convinced that they open perfect everytime. I think because of the design of the NAP even if it didn't open completly you still have a great cutting diameter. Looks like they are less expensive than the RAGE as well
The one thing that turned me off of the Bloodrunners is watching the video. The arrow hits the target, the bloodrunner goes backward to expand and then is driven through the target/animal by the arrow shaft. The penetration isn't one solid movement and that is what turned me off of them.