isn't the canon 70-200 f/4 non IS like $500?
A little under $700USD, from what I can remember. I bought it a couple of years ago. Fantastic glass for the money, depending on what you need it for. I do mostly landscapes, so that IS or f/2.8 version of this same lens doesn't do me a lot of good. However, if you're shooting inside sporting events, or need to go wider than f/4 for some reason, it might not be the best choice.
Also regarding OP: Do NOT get that Canon 75-300, the one with the silver ring you'd mentioned in the first post. That lens will do more harm than good in terms of holding you back as a photographer. The IQ is quite poor.