I am the proud owner of the denon 3801 which i bought in may 2001 only to have the 3802 launch later that year with prologic 2. I have been satisfied with the receiver perfomance, dolby digital,dts are great and the stereo reproduction is quite decent. I have recently upgraded my dvd player to Denon 2900 and was wondering whether i would notice any "Improvements" by splashing out on the denon 3803,sony Es 555 or the pioneer AX3. Would this upgrade be justifiable . I mean I am missing anything, by not having Prologic II or the extremely rare DTS 96/24. Any opinions will be highly appreciated .