If you have support from your dad to buy a new European car/suv, then go for it.
Most people use Japanese cars because they're reliable, but mainly, they're much cheaper than European. Not too many can afford a car that cost well over 4 million bahts.
If speed is your thing, a European car/suv will be safer and more stable at anything over 150km.. German car are design to go well over 200km. all day long. Not the same with Japanese where speed limit is 80 - 100 km..
I have no doubt that Bank is correct with his suggestion, he know his stuff well.
Please keep in mind that Japanese car are reliable when they are standard. When you start to modify them for maximum performance, you'll loose that reliability (relatively proportional to the modification).
What about transmission? Has your automatic tranny been designed to take on 300 h.p.? (The previous 2.0 Forester XT has problems with its 4 speed auto).
So, sell your car to me or many members looking for a 2.5 Forester, then go and buy a German cruiser.