im thinking of buying a Subaru in the next few months. most likely an Outback. (personally i would love a WRX but maybe next time

how many kms are too many? i have been looking at carsales and put max 150thou kms and there are some good bargains, but there are even more that have done about 200thou kms - is that too many?
it will be my daily driver, work car, family wagon, camping trips and possibly caravan tower.
I was thinking of the 2.5 4cyl due to rego costs and economy, but is the H6 3.0 really any more thirsty? as i do like tourquie motors.
any tips or ideas, let me know
cheers
Dreamin Dreama