I am really torn between these two camera's and for what i will be doing it probably wont make much difference so i could do with some advice. What are your opinions on what i have said?
Modern Nikkor lenses have AF-S (internal motor). Can you name a Nikkor lens that you absolutely need, that is not an AF-S?
The Nikon D40X is more affordable. It will do anything you need it to. The Nikon shutter release sound - and I'm glad someone mentioned this - is great; it makes you want to keep taking photos.
I'm very happy with my Nikon. One of the best investments I ever made.
This is of course a personal opinion, but the Sony A100 is just outright ugly.
As for the sensor cleaning device (and not a lens cleaning device), if you intend to keep the same lens on all the time or even almost all of the time, why do you need it?
Stabilisation on the sensor seems a good idea, but wouldn't you rather see the effect of stabilisation as you look through the viewfinder? Nikon offers a wide variety of stabilised (VR) lenses.
Do yourself a favour and get the Nikon D40X.