Both very true, but I do not like gain matching and would trade the reliability (to a point) for convenience there. Stephen Mantz used to always insist that the far east class D circuit designs were really rock solid and reliable up to about 2000-2200W and beyond that you're rolling the dice every time you power it up. This has been consistent with my experience as well.
Didn't that guy burn all his vendors and authorized repair guys then disappear?
So that's why you have 2 year warranty. They're cheap enough you can just buy a spare for when one is out for warranty repair or just throw them away when they break after that. Repair on Korean 8K half bridge boards can range from 350-900$
I finally got my Soundigital 12K back installed and IMO it performs better than the SFB. Dollar per watt Soundigital is significantly more than Sunown's Chinese clones though so not sure if they're worth MSRP.