I came into my current '14 Trail, from a '13 WRX Hatchback, and a family of Subaru owners. I think my WRX was my family's 12th Subaru (mostly Outbacks). If you are looking for a family friendly wagon, with room for a dog/cargo, and moderate cabin space, the Outback would be a great choice. MPG is ok, but it is full time AWD, and I have yet to ever drive a car that trumps a Subaru in the snow and I live in Buffalo NY. We know about snow here.
If your not doing any serious off roading, it should also be fine for anything you might run into in terms of poor road conditions. While they dont hold their value like a 4Runner, Subaru's are still very reliable, and were just recently ranked the top mfg in terms of customer satisfaction of any major car brand. The Forester does share many of the positive characteristics that the Outback has, but IMO, it looks like shit. However; you did note the availability of the XT version - 2.5l (might be a 2.0l DI (?) now) 4 cyl turbo is a quick little engine and puts down good power for a small SUV. Gas milage isnt brilliant as a result however, and the CVT transmission isnt the most exciting.
If thats what you see yourself using the vehicle for, and you think something smaller than a 4Runner would be convenient for your daily needs/size requirement, that would probably be a solid choice.
However, as pretty much everyone has noted, the 4Runner isnt really a comparable to either of the Subarus. This is a manly man, body on frame SUV, and rides like a truck (albeit a comfortable one). The interior of the new '14's is defiantly a big step up from the '13s, the ride (esp. with KDSS) is pretty decent, and its obviously one of the most capable off roaders from the lot. Its much larger than either of the Subarus, and would defiantly be more comfortable if you forsee larger people in the backseat, or need more cargo space than a wagon. You can do some moderate towing, the 4WD is great, and it is overall a super solid, tried and true truck. People piss and moan about the v6 and the old 5 spd auto, but they put down reasonable figures, and last forever. MPG does blow as a result (5k lbs truck and 5 spd tran), especially if you load it down with tires/skids/etc.
Each vehicle you listed has a million positive attributes, and some negatives as well - you just need to think about what you want to spend, and why.