Here is my criteria for looking at high res audio:
First of all I always try to get a 24bit album over a 16bit CD version or download, that is if the original recording was made in 24bit.
Second I try to get the recording at the sample rate it was recorded, if it was recored 48khz then I go for that, if its 192khz then its 192khz
Third if the price for an album download is not right common sense applies....
Other than that I am just enjoying high res music