the reason macs are more expensive, is because the hardware is better quality. there are people here using macs that are 10+ years old, and they are still working great. you can spec out a similar pc for probably less then half the price, but it will probably be dead within 2-3 years.
i would suggest first going to an apple store, or apple retailer, and trying out the os first. and be prepared for things to work in a different way.
if worst comes to worst and you buy one and you hate it, you could take it back, sell it, or boot windows on it, then you have windows with very good hardware.