A single tuner box is just as hard/easy to get your head around as a multi tuner box.
As you'll now have atleast 3 feeds going to both rooms, I'd be looking at boxes that support DVB-S & DVB-T, gives lots of more recording & watching options.
GigaBlue Quad or Duo2, maybe Uno but slightly older.
You're spending $$$ on the house, spend a few $$ on the receivers too, better than trying to flog off a box that doesn't use your set-up properly a few months later when you realise how easy it is to use E2 boxes.