th edifferece is that the dv-38a has dvd-audio capabilities and the 37 does not. the link he gave you is very informative, but should be taken with a grain of salt. many of the tests that they run on all of the players are very special cases, and do not affect real time usage as much as you might think. (as far as combing, etc. most dvd's are flagged properly through the movie - and who needs progressive scan on extra features, anyway?)
but, i digress. if you want dvd-audio, buy the 38. if not, the 37 is a very nice player.
but, i digress. if you want dvd-audio, buy the 38. if not, the 37 is a very nice player.