An email from Amazon USA support has confirmed that BENQ Z-Series monitors shipping from Amazon.com are now shipping with Version 2 firmware, compatible with Blur Busters Strobe Utility.
The same applies for Amazon Canada too.
The following monitors are on Amazon:
BENQ XL2411Z – 24″ 144Hz monitor with “better-than-LightBoost” blur reduction
BENQ XL2420Z – fancier bezel, extra ports (2 HDMI + DisplayPort), S-Switch remote
BENQ XL2720Z – 27″ version of XL2420Z including the extras.