Getting an RX 480 soon, should I use my HiPro 350W HP unit or a Cooler Master EX2 "525"

I switched from my CM unit to this HiPro because my PC was crashing sometimes (turns out the motherboard's BIOS was bad or something)

I trust the HiPro unit more because it's like twice as heavy as the CM, and I ditched the CM because under load with my current 750, the voltage dropped a lot (so the regulation is shit)

The voltage drops by a much lower amount on the HiPro.

Also, the HiPro has MUCH larger heatsinks, and seems to have more componants inside, which tells me it can easily handle the full 350w load that it's rated for.

Also, JohnnyGuru reviewed a HiPro unit and it was quite good, and HardwareSecrets reviewed a similar unit to my CM one and it blew up on the table...