How to improve power supply on a switch?

[Vangelis]

I’m am pretty green, knowledge wise regarding networks, but I am learning.  I have TRENDnet TEG-S50g switch that’s DC input is rated at 5V /1A.

I am looking replacing the cheesy switching power supply with a linear supply. 

I want something better the than the stock PS but still want something cost effective. I may buy a far better one down the road but I would like to hear that a linear supply will sound better.  Can anyone recommend one. Sometimes I’ve seen specs  on voltage, amperage and watts. With something like a switch do I have to pay attention to watts?

[Vangelis]

Found this PS. Not familiar with the vendor. 
https://www.aliexpress.com/item/32821592273.html?spm=2114.search0302.3.47.67f9144dW2ewPx&ws_ab_test=searchweb0_0,searchweb201602_0,searchweb201603_0,ppcSwitch_0&algo_pvid=521167c5-a5ae-4276-b498-fc914d9465ab&algo_expid=521167c5-a5ae-4276-b498-fc914d9465ab-7