look under hometheaterhifi.com they have a progressive scan shootout. very informative on dvd....picture quality. if you are happy with the dac in your speakers...you could get a 500$ dvd with great picture and the sound of the music. (this dvd is supposed to trounce some 4k+ dvd players as it employs some new chip technology). or so i have read. fwiw
good luck
good luck