Having owned both a Mooney (M20J) and a Bonanza A36 I think they are both fantastic machines. But they are Porsche and Mercedes Estate. The Mooney is low slung, firm ride (in the air and on the ground) doing 160kts at a miserly 9 GPH at 10k feet and able to carry 2 + 2kids and a very carefully packed set of luggage.
The Bonanza (with tip tanks and turbonormalized) does 175-180 on about 14 gph at FL100 is and about 200 kts at FL180. This gives 1400-1600 mile range (everyone bring their own O2 to the party
). It also can carry 4 + 2 kids plus random luggage to Denmark pretty easily.
Neither of them is particularly good at short fields or rough grass. If my mission profile was wife and I, it would be the Mooney - Plus growing kids it’s the Bonanza.
I have never flown a TB20 so have nothing to add to IOs comments.
CFwake - The view of the Greenland Ice Cap is fantastic - A sight not to be missed if you have the opportunity. Just don't think about how much rougher the water is when your testing the survival suit and raft than when gazing down from FL100.