Do you guys know if a PC or MacBook Air is better?

Impossible to answer without any sort of context, or background.

What you intend to do with them.

Specs of each,

PC Brand,

etc...

Its like asking which is a better a Ford or a Chevy? without specifying model, features, year etc...

Macs are cheaper to own that PCs: http://techpatio.com/2010/apple/mac/it-admins-total-cost-ownership-mac-less-pc

and: http://www.zdnet.com/blog/apple/tco-new-research-finds-macs-in-the-enterprise-ea sier-cheaper-to-manage-than-windows-pcs/6294

http://www.macworld.co.uk/news/mac/smaller-windows-pc-makers-nip-at-apples-heels -in-customer-satisfaction-3573452/

Why will you love Mac? http://www.apple.com/why-mac/

- Better Hardware http://www.apple.com/why-mac/better-hardware/

- Better software http://www.apple.com/why-mac/better-software/

- Better OS http://www.apple.com/why-mac/better-os/

- Better Support http://www.apple.com/why-mac/better-support/

- It's Compatible http://www.apple.com/why-mac/its-compatible/

Switching from Windows to Mac:

http://support.apple.com/kb/HT2514?viewlocale=en_US

and

http://support.apple.com/kb/HT2518?viewlocale=en_US