Yea, your actually supposed to turn the IS off when you put it on a tripod. But will 100% of your work be on a tripod? If you want the best bokeh for the money, skip the 1.8 and go for the 1.4 like someone mentioned. Its a couple hundred more, but it is well worth it! But if budget is a huge concern, you cant go wrong with the 50 1.8.
Not 100% but I have steady hands, also this is to start photography as a hobby not work related or to make it my job so I don't want to have to spend loads of money. This is also another reason as to why I asked about the 60D because I think that it will last longer due to build quality etc.. I don't really want to have to upgrade the body in a year or two, I don't mind buying lenses because they will work on future cameras (unless I get a full frame then I know EF-S lenses wont work).