Thanks again for all the comments!
So now I made the move and whent to buy my gear to start with, 40D it is. About the lense I think the decission was quite typical for me... After trying to choose between those two options I then bought neither of them but something else.. And that was 24-105 4L IS. Many might say it doesent make any sense on a crop, but there was couple of reasons for changing my mind on last minute.
First, I was trying to find out what I really need on with this multipurpose lense, and was using my dad´s 17-85. Found the WA very nice, but even more would have liked bit more reach for travelling & hiking. Also like to shoot portraits and people in general from as far as possible to get "natural" situations and expressions etc.
Secondly, the 24-105 was in nice sale right now (-30%), and think I can get it sold pretty easily if I really will regret the decission.
I know I will miss the WA a bit, for sure. Also the speed yes, but then again I´ll use flash inside anyway etc, and will expand my bag with some primes one day. The build quality, colours / contrast, reach and the current price just changed my mind. I will also upgrade to FF when the budget allows, so I´ll guess it would be usefull then too, and will get enough WA then at least.
So difficult this is, but now the decission is made and it is time for some heavy training! Happy so far, let´s see for how long.. Thanks again, time to go for some shooting now!