RE: looking for advice buying a new board
What you should be looking for is a freeride board around 100-110 litres. Your partner a freeride board of 125-135 litres. If you both want to share one board then buy a board around 120-125 litres.
There are a lot of different freeride boards - every brand has one. I don't have any experience with them, but try searching the internet or reading some magazine tests or wait for other peoples replies...
All the best!