One aspect, I didn't mention is, that I want to use my upcoming bike as a sports vehicle more or less. Since I've two small kids and literally no time for sports I try to incorporate workout in my daily routines. So it's better for me to take 30 extra minutes to get to work and back instead of spending a total of three hours in the gym.
I did that already last year and it worked pretty good (my mountaibike was annoying as hell though - numb hands and arms; not very fast).
So when I'm riding my bike, I push myself to the limits. Always full blast.
Sorry for not mentioning that earlier!
Thanks for all your help guys!
Carlito