Not sure if the dual view needs the PVR subscription, but you'll need it for the Explora obviously. R69-R159 not sure how much lately.
You'll also need a new smart LNB, and prob installation if you're not technically inclined.
It's great being able to record, pause rewind etc. if you like your DSTV, you'll love the PVR functionality.
It is an added extra if you have uncapped internet, then you get even more content via internet. May need a wifi dongle if you don't want to wire in Ethernet cable.
(I stream most things nowadays, divorced DSTV because of the cost. )