I recommend Carenado planes. Pick one you like. I love their 182 RG and Piper Archer II.
AS did a brilliant homebuilt Rutan Canard plane that is quite realistic inside and out. Awesome bird...
Eaglesoft have some nice lineups of Executive aviation as well as a very nice Columbia 2 place.
We really need to know though what kind of planes you like... Are you into everything? or are you into military aviation, tube liners, biz jets, biplanes, low wing general avaition, etc, etc..
Theres so much.. .
Including boats.. Cars... Collecting custom scenery, photo real terrain.. You name it. So much to get for FS.
Bill