Yes go for the Mac, after

Yes go for the Mac, after you get the new interface learned you will enjoy editing much more(i had it learned in less then a week). the Mac doesnt crash and rarely do you need to restart it no anti-virus software to buy ever. A new mac mini will work just fine for editing however the hard drives are a bit small and if (this is a big if) you dont like os x you can put windows xp sp2 on it and have a fast computer running windows.