it is a decent solution but looks like 162 watt is max op says he should stay in the 100 to 120 at max. It could work for him. I found an antec ea 380 watt link.
this should give 80 percent at the 75 watt and up it is 45 bucks the solution above is 87 percent and costs about 100 .
if op pulls 50 watts average endlessly the 80 percent is 62.5 watts the 87 percent is 57.5 watts so 24/7/365 is 43.8 k watts a year at 20 cents per k watt he breaks even in about 6 years
but atech has a review on it
if the op has 115.0 volt power source .
this has a 79 percent at 38 watts and a 84 percent at 76 watts.
At 84% this would pull 59.5 watts for a constant 50 watt pull. the 87 % would pull 57.5 that is only 2 watts an hour or 17.5 k watts at the same 20 cents a k watt more then 13 years to break even.