Ks, pick the one that fits the price you want to spend.
eTen is cheap and goes from about £90 for the handle operated dropper up to about £140 for the integral remote version. There’s an external remote too.
Buy from bike-discount, cheapest I found when I bought my lev or if you want to stick to uk stif cycles.
I think the Redneck one on Ebay is the only 27.2 with 125mm travel. Not found any reviews of it yet unfortunately, but it seems unlikely to be as well made as the KS options. Possibly easier to strip and service though?
been running the KS Lev Integra 27.2 for the last couple of months, so far so good, only 100mm of drop but seems to be enough for my riding. Fitting was super easy on my 2016 XTC advanced hardtail. Not cheap though.
I ran a HiLo for four years with no issues – worth checking the air pressure in the post occasionally. The remote lever is pretty crappy mind you, I ended up replacing it with a modified LH Shimano shifter and it was a huge improvement.
My HiLo has been pretty faultless for the last 5(?) years. It developed a bit of side to side play early on, but hasn’t got any worse.
They don’t like being wet, they get a bit sticky and squeaky. So I try and use a rear guard in winter, or make a boot out of some old inner-tube, saves the seals too.
The standard remote is a bit crap, but I used one from an old Maverick post and it worked well. I’ve now bodged an under-saddle lever for it from some aluminium bar as I swap it between bikes quite often.