From what I understand the NUBM44/47 is one of the highest power single-diode laser you can get. If you buy just the diode, you will need a heatsink, something to mount the diode in, a lens, and a constant current driver. There is a BlackBuck 8M at DTR I am testing that works nice. OptLaser has a “low cost” driver, too. https://www.laserdiodecontrol.com/shop/Laser-Diode-Driver-5A-OEM-Opt-Lasers
Otherwise, if you’re handy, building one is doable.
The Endurance laser is 10W in impulse mode (not even sure what that is yet). Not even sure you’d want to run it that high since it’s way above spec. 8W continuous. All 10W Endurance laser variants have the same NUBM44/47 diode in them. You’re paying for features in the different 10W models. The 8W probably has the same driver too - but that’s just a guess.
JTech makes a nice looking kit and seems to have a good design. I’m new here, so I’m not sure who can speak to that one. I almost purchased that one.
Also look at l-cheapo MK-7. https://www.robots-everywhere.com/products/l-cheapo-mk7/
In my limited testing, I can cut 1/16" plywood with 2 passes at 4mm/s. I think you can cut thicker, but you’re going to be there a while and burn the sides pretty good. Also look at air assist and don’t forget about fume extraction.
Not sure what you mean by Jtech not having speed/power. You’ll use PWM out from your board to control the power. If that doesn’t clear it up, please elaborate.