Miranda,
I would suggest you look into all the fun breeds out there, and decide what you want. Quite honestly, it is easy to find someone with whatever breed you decide on (these forums are a great source) and will be better quality usually then you can get at a store-they come froma hatchery.
I work in the cities and live on the MN/WI border fyi.....and am on the Wisconsin cheesehead forum most of the time.
As far as a rooster: My experience, I bought 8 chicks when I started out and it turned out that 3 were roosters. I was so attahed to them and it was really hard to give them up. Even harder is to find good homes for them where they wont be eaten. This year I risked it again and let my broody hens hatch some eggs-and ended up with 3 more roos. Even when buying "sexed" pullets there is a small risk with one being a cockeral. My suggestion is to start out with pullets...and if you dont end up with a roo, then watch online for someone trying to re home a FRIENDLY rooster. The cockerals are always the ones that end up a favorite then later can become agressive. It is much easier to wait and let someone else hatch out and raise up a roo-and then when they are around a yr old you will know what their disposition is..plus you will make someone VERY happy to find a good home for one. As far as whether you should have one or not....many pros and cons in my opinion.
Pros: They protect the girls, will keep then close if free ranging (hens tend to wander off more iwhtout a roo around) and they are always on the look out for danger. Plus I love the sound of them crowing.
Cons: The biggest negative is the worry of aggression towards you or family members-especailly if your handling the hens and the roo thinks your hurting them. And lots of people feel that its not worth paying to feed a roo when they dont produce eggs.
There are particular breeds that are known for having more gentle roosters: the ones that I have heard over and over again are: Cochins, Faverolles, and Orpingtons (Seems a lot of people feel the Lavender Orpingtons especially are more calm-although not sure why this would be as the colors are allthe same breed).
I apologize for the run on paragraphs-something is up with BYC and when I post it all runs together..