What is your budget?
Macs are more expensive than PCs in terms of price range. The cheapest Mac laptop is the MacBook, which retails for $999. With tax, you are going to be spending slightly over a grand. You can also choose a MacBook Pro, which ranges in price from $1,199 to $2,499, or a MacBook Air, which ranges in price from $1,499 to $1,799. Macs however, are not necessarily more expensive than PCs in terms of what you get for your money. For example, a PC could cost $500. But, it would not have as good of specs as a MacBook.
Leaning towards a Mac but $1000 is a bit out of your price range? Consider buying a refurbished laptop. Apple often lists refurbished MacBooks for around $850. Also, if you are a student, don't forget about your Apple student discount. It will easily knock $100 of the price of any laptop.
PCs are cheaper than Macs in terms of overall price range. You can get a laptop PC from Best Buy for $400. Laptops, direct from Dell's website, start at around $400 as well. Just remember, that $400 laptop is cheaper, but it does not have as good of specs as the Mac.
A Dell Inspiron laptop, with about the same specs as a MacBook, will run you about $700. So, about $300 more for the Mac.