You will always want more power. It's weird how we operate as humans, but we adapt very quickly and even some of the fastest cars car begin to feel "normal" after a while.
My 700+ RWHP Lexus IS300 in a 3100 lb car felt slow after some time, while to others it was the scariest thing that have been in.
With all that being said, if the supporting modifications are not made to actually put the power down to the ground efficiently, it will not matter. Feeling fast and being fast are 2 different things.