looking to buy a Mac for Logic

Hi, wondering if anyone could give me some advice. I currently make music using cubase on a PC, and i record vocals and piano/guitar whatever through an EMU 0404 external interface. From that I have KRKs plugged in.

recently i have been thinking i should get a Mac, because everyone is always saying how good they are and how Logic is so much better than Cubase because its not used in the industry etc. If i did get a Mac, would i still be able to use my Emu interface for recording audio? Does proteus work on logic? does logic come with sounds? Which is the best mac for recording/mixing music? and also, if i get wireless internet on it, will that slow it down or affect it in any way?

i'd be really grateful if someone could give me some tips. Im clueless! Thankyou,

steph