There is a great difference between a FUN car and a FAST car!
FUN cars are more enjoyable and rewarding to drive even if you are always under the speed limit.
A friend of mine spent a lot of time working on a corolla ke35 two door in Islamabad. He settled for a 1.6, 16 valve 4age which officially made 130 BHP out of the factory. I am sure his made less!
The car was FUN TO DRIVE! It was not super fast or the fastest in town. But it was safe, controllable, comfortable yet very engaging to drive. That is why he could make it scream and push it hard without endangering himself or anybody else on the road.
Why do you think the mazda miata is the worlds largest selling sports car?
Small rwd cars with basic suspensions and little weight are prone to disaster with BIG six cylinder engines in my humble opinion. I don't know how you can enjoy a car that is setup to kill you!
My honest advice is to stick to 4 cylinders whichever car you choose.