I would love to see some input on this thread from Iceman and JP who have owned big power GTRs and other exotica.
Sorry Rich, Just catching up on the forum as I am on holiday
Some very good posts in this thread, how is the manual F-Type coming along Jonny
All of my comments refer to my >600hp GTR

It does have too much power for general roads, unless you're sensible.
tsinc has already made some good points about the GTR and how fast it can be, I will add some of my thoughts on why I sold it.
One of the reasons for selling the GTR and moving to an R8 V10 was the performance, but it wasn't the main one as the V10 is obviously still a quick car!
With the GTR (mine was tuned to 640bhp/610lbft) you mash the throttle and are going say 120mph from 60mph in about 6 seconds, I recorded 62-124mph (100-200kmh) in 6.45 seconds.
That is fast, but it is still plenty of time to understand how fast you are going and be aware.
I also recorded 50-70mph in 1.31 seconds, that is just amazing for overtaking, you can be past things so fast that I think it was actually pretty safe as you are on the wrong side of the road for less time.
I think the problem with it was me, I was driving too fast when I shouldn't and with the gearbox you didn't really have to think about driving it.
Sure you have to counter steer a bit when the back end gets happy and get the braking right when driving fast but it felt a bit lazy.
After the excitement of finally owning one wore off it just wasn't satisfying to drive fast.
High speeds end up just feeling slow as it handles the speed so well and if you don't drive it hard at normal speeds it is not exactly a nice car to drive.
I also wanted a manual gearbox again and with a high revving NA engine the R8 V10 was the perfect choice in my opinion.
Being able to go from cruising along in 6th and drop straight down 3rd without having to go through all the other gears to get there is so nice.
The satisfaction of shifting though a gated manual is so good, each gear is like a bolt action rifle!
So, I don't think there is really such a thing as too much power, it is more how the driver wants to drive, is it about the destination or the journey getting there, sure you can go bloody fast without trying but other than the acceleration and g force was it really that fun doing it.
Not the greatest of posts, just woke up and jet lag!
If I think of something else I will update it.