some of the crap posts on this board disappoints me, but then i remind myself that these people are idiots of the likes of those who put on a chrome muffler tip and expect a car to go faster.
...those who think 200 hp is worthless in a sub 3k lbs car or that if it isn't turbo stock then they will write off the car completely, or god knows some other x-y-z is not enough or whatnot, are the people that I am also skipping over on the forums and completely disregarding.
you know who you are.
and back to reality, the only swap I personally find of value would be another boxer engine. the whole idea is low COG, and if engine mounts and firewall are setup for a subie boxer engine, the first swap will likely be that from some spec'd out wrx that earlier-said idiot probably crashed.