GA1dad -- yes -- LOW LATENCY (LL) is the most important characteristic you need. Bluetooth with aptX LOW LATENCY. It MUST be LOW LATENCY. That is what assures the "delay-free" transmission from the unit to the headphones. Regular bluetooth or aptX are NOT sufficient...the "LL" is a specific type of Bluetooth headphone.
The ones you linked, are a "BT80" model headphone; the same as the Minelab ones (which they call "ML80"), and the Tronds, and the Miccus ones, and several others. A few BT80 models have slightly different tonal qualities (some emphasize bass a bit more, some don't), and there is a model with a few other "features" on it, but basically they are all the same. The ones you linked ARE aptX LOW LATENCY -- which is assured by the fact that they specify that they include the Qualcomm CSR8670 chipset. THAT chipset is one of the ones that is a Low-Latency chipset. You would be good to go with those; the ONLY chance that you wouldn't be, is there are occasional pairing issues with some sets, and the EQX. Lots of research on my part has gone into trying to figure out what the that incompatibility is caused by, and I have been unable to reach a conclusion. I have basically the EXACT phones as the ones you linked, Bluetooth version 4.1, and they work/pair/sync perfectly. Meanwhile, though, a few folks have had pairing issues with the "BT80" phones and their Equinox, and have assumed the issue to be that BT 4.2 or even 5.0 versions are required. But, I've done a ton of research and testing, and have never been able to confirm that -- or to assign any other reason to that occasional pairing incompatibilities. I can say for sure that I have confirmed pairing of 4.1, 4.2, and 5.0 version BT80 phones to various Equinoxes...so why some won't pair is a mystery that I have chalked up to something faulty within a particular pair of headphones (an electronic issue), and NOT a general/broad incompatibility of any sort, but that's a tenuous conclusion.
BOTTOM LINE, if you buy those phones, you SHOULD be good to go; I would buy them, confident that they would work (because they SHOULD), and then if you can't pair them, read your manual, and/or visit here to get specific pairing instructions. In the end, if others can help you confirm that for some reason they WILL NOT PAIR, you can always return them as it would suggest a flaw in the phones. Again, I have an identical pair (just stamped with a different "brand," but produced by the same factory in China), and mine work perfectly -- and have for 3 1/2 years now.
Hope this helps...
Steve