RealNC, additional info on the XL2540 for users unfamiliar with the BenQ/Zowies:
OP appears to be using Blur Reduction already (Strobe Utility = blur reduction enabled). The XL2540 apparently has one of the better looking blur reduction after advanced vertical total tweaks when using a lower Hz on a 240Hz monitor. For example, a carefully-calibrated 144Hz blur reduction on a 240Hz benq, with the large-vertical-total trick, can end up having have less strobe crosstalk than the Dell S2716DG ULMB. Strobe Utility has the ability to adjust input lag of strobing too,
http://www.blurbusters.com/strobe-utility
This is something you cannot customize with ULMB, that's why Strobe Utility can be used to decide what part of the screen you want to have the lowest input lag during strobe mode.
Some eSports players adjust the "crosstalk bar" zone around a little bit until the lag of the preferred location on the screen is lowest (e.g. moving crosstalk bar about 3/4th the way down, so that crosshairs is clear AND lower lag). That results in less input lag than ULMB, guaranteed -- since the crosstalk zone of ULMB is generally non-adjustable.
Therefore, BenQ Zowie monitors are the best for strobed eSports; that's important for competitive players who want strobing AND low lag.
Now.... The S2716DG only supports ULMB at 120Hz as far as I know. So if you like blur reduction, then you're going to have to drop the refresh rate a little bit.
The XL2540 running large vertical totals at 144Hz (e.g. 240Hz Pixel Clock while having a 144Hz Vertical Refresh Rate), will probably have even less strobe crosstalk when calibrated with Blur Busters Strobe Utility.
Since I presume Version 2.0.9 of Strobe Utility is working beautifully at 182Hz with your XL2540 -- the same Appendix A trick at
http://www.blurbusters.com/crosstalk (scroll halfway) -- can be used to create a 144Hz blur reduction mode with reduced strobe crosstalk. So it may be best to try out existing monitor.
Also -- generally, all ULMB-capable GSYNC monitors that only go up to 144Hz-165Hz, only supports ULMB at 120Hz or less. You need a 240Hz GSYNC monitor to gain access to 144Hz ULMB. NVIDIA intentionally locks higher Hz (since that is amplified strobe crosstalk during blur reduction, due to lack of time for LCD pixel transitions to complete between refresh cycles), while BenQ/Zowie keeps it unlocked, letting the end user decide to adjust on the crosstalk-versus-quality tradeoff, by choosing to lower Hz or not.
One seems to have several options:
1 -- Use the XL2540 flexibility to choose a different Hz blur reduction, trying out 144Hz to reduce strobe crosstalk while smoothing things out
2 -- Switch to another monitor, such as S2716DG and give it a try (Risk of improvement/no improvement). Play can be smoother on a GSYNC monitor due to GSYNC's ability to destutter varying frame rates. GSYNC can be amazingly smooth but can be very motionblurry if you are very used to blur reduction.