In fact, I wouldn't be surprised if the installation'll pick up that little piece of the Windows bootloader that's practically impossible to get rid of and end up giving you the dual boot option anyway. But that's good, it'll give you some experience in editing configurations, which is something you're gonna have to get comfortable with.
This. There are also open source boot loaders you can toy around with.
I know switching to Linux is the hip thing to do, but really think about all the things you love to do on the computer and find out if you can do it on Linux without getting your Master's in Assembly code. I've always been really impressed with Linux, but really uncomfortable. To me, my OS is like my room. If it's not exactly how I like it, I throw up and carve pentagrams in my abdomen.