Hay guys, thanks for the replies.
I think i am going to go with the pre-geared motor. It should be more quiet and as crackerdog pointed out it could be potentially very dangerous. morph99 i am not against hub motors at all, they are great, but unfortunately they limit gearing options. Mabman that is a nice motor, cheap and powerful and compact, unfortunately it does not fix the gearing issue and the chain would still be turning at at least 2500 rpm, so unless a belt drive sprocket could be attached to it, which i fear it could not, it would still be dangerous and to fast. Though if later on i decide i want a more powerful motor i think i will defiantly be heading towards that bad boy.
Thanks for the help,