Not a 135i owner, or a Subaru fan, BUT yours looks real nice, understated and FAST
However, the thing that a BMW offers over other brands is ride quality, interior appointments, and quality. The only issue that haunts the 135i is the High Pressure Fuel Pump, so you might need to have it replaced a few times during your ownership, or you may not, it's luck of the draw really. BMW has extended the warranty on the pump to 120,000 miles so it really shouldn't be an issue for you, apart from the hassle of having to either have it towed to the dealership or limping it there. Aside from that one little problem, it's an excellent machine that offers great performance for the price.