Only Teddy Pardo and SBooster list the most important specification: ripple noise/voltage. Teddy Pardo regulates it down to an impressive 1 µV. However, the SBooster ECO has a relatively high ripple of <1 mV at full load. It is recommended to purchase the Ultra add-on, which reduces ripple to the 10 µV range.
Alternatively, consider the LHY PS, which offers 17 µV ripple at no load and 150 µV at full load for around $60–70 (15VA model)—not bad at all.