Test equipment specs?

Hi all. There's a lot of posts in this forum with noobies like myself asking basic questions about test equipment. Would a sticky that outlined general recommended specs be helpful? Maybe a "Good / Better / Best" type of thing, maybe? Surely folks can understand how daunting it is selecting equipment when starting from zero? We understand it needs to be good, but how good? Not like "this cable sounds better than this cable" good, but "don't buy this function generator because the THD is too high for amplifier testing purposes" type of good.