Sig says you have a 620W.
That's more than enough to run a 125W cpu, 75W gpu and a few dozen watts for the rest.
Anywhere upwards of 300W from well known brands will run that if everything hits maximum power draw which is a rare thing.
When you pay more you're usually paying for less noise.
Higher wattage usually involves a physically larger psu which can dissipate heat more easily with less fan use - so less fan noise. Excess wattage also covers you for future power requirements.
Higher efficiency usually means less fan noise by not generating excess heat to dissipate while producing the voltages needed by the computer.
Semi-passive is a feature on some high end psus where they've been designed to dissipate enough heat to turn the fan off below a certain output.
You can always go right for fanless which is frankly a mesh box and high efficiency for no fan noise at all, just a significant premium.
After that, check the model you're looking at to make sure there's no weirdness about it such as coil whining, irritating fan behaviour or flat out suspect reliability.
As far as brands go, Super Flower is very favoured at the moment.