Sir
If you do not mind, I have some serious reservations regarding the SQ or objective:
There is no concept of SQ with a DVD Player, unless it is very high end.
I recommend a good HU like Pioneer P80RS, P90RS, Alpine CDA 9887.
Secondly, Pioneer 5300T and Kenwood S702P does not suit each other at all, I also have queries regarding Kenwood S702P and Pioneer 5300T, cant understand why you are reluctant of Type R or Polk Momo.
Why have not you considered any JBL or JL SUB for sealed application?
Lastly, where are the rear speakers?
Regards