I recommend the Super Flower Leadex designs. Solid power supplies. If I were to buy something on this capacity range right now and money wasn't much of an object, I would be looking at the Leadex Titanium 850W SF-850F14HT
Please contact the distributor in your country for the availability and quotation
www.super-flower.com.tw
This doesn't have a native 12VHPWR cable, but you can buy the CableMod E-series from Amazon for $25. Works great.
If you're looking for native models. Seasonic's Vertex lineup and the ROG Thor Platinum II (this last one is particularly expensive, but it has a built-in screen with real-time load measurement) are top picks from me. PSU and motherboard are areas I never ever skimp, but there are more affordable solid models - and those are some you listed, the Corsair RM1000x is one of those. If that fits in your wallet and you don't particularly care for high performance/efficiency, just reliability, buy that and don't look back.
Seasonic VERTEX PX PSU, features a platinum efficiency rating for exceptional energy savings and stable performance. Designed for demanding setups.
seasonic.com
ROG Thor 850W Platinum II is the quietest PSU in its class.
rog.asus.com