On a GC, you swap EVERYTHING including the wiring and dash from the STi since you have those parts available. This means DCCD works. Everything works. The cars are very similar.
Swap the pedals and master cylinders. Clutch is then not a concern.
Swap everything. There are very few real issues as long as you have the full donor car.
If you wreck again, who cares? Buy the car back with a salvage title for $1000 and part it out. Or swap it into the next car. Cycle continues. You're no worse off than now.
Also, on the GD chassis, once all the parts are off, the STi, the WRX, the base Impreza, the sedan, the wagon are all virtually identical. Swapping around between then all is nothing. The GC/GM/GF body is also VERY similar. Stuff just bolts right up. Same with the forester platform since it is based on the impreza platform.