We have a place here just a few miles up the road that has a wharehouse full of used subaru parts. Its all they do. she has probably 50 engines of various types.2.2 2.5 dohc sohc etc.
I can give you her no. if you like.
I would opt for the shortie but you do what you think is best, If you plan on getting into subarus it may be handy to have an outlet for used engines and also to have a new reman on hand of the more popular ones.