For people who are die hard Apple users they will tell you APPLE all the way. For people that are die hard PC users, they will tell you PC.
Have you ever edited a video before? What preference machine do you have? (mac, pc?)
I have edited video with Mac and PC and its all the same...just what you are more comfortable with.
Let me know what you currently run and I can try and turn you in the right (affordable) direction.