How many coffees does he have a day? Espresso only? Milked based coffee like cappuccinos and lattes? Does he make multiple drinks at a time? What grinder does he have? What didn't he like about the Silvia - more specifically, what does want that the Silvia couldn't deliver?
If this is all too hard then just tell him a Ponte Vecchio Lusso 2 Group and be done with it!