I want to make hip/hop beats. I was looking at the Macbook Pro 13' one for 1300. It has 8 GB , a 2.5GHz Intel Core i5 processor and a 128GB solid-state drive. I'll be using garageband, and buying an external motem. I have a keyboard that I'd like to connect but how do I know if it's compatable with this specific macbook, and what cables would I need to connect it and a mic. Any advice?Thanks!