Which audio card to get for Macbookpro

[Servellen]

Hello,

I just switched from pc desktop to a Macbookpro 15". Am very happy with it so far, but I wont be able to properly test it until I buy a sound interface for it.

I spent most of my cash on the mbpro so i am looking for a affordable but good quality interface. I cant decide between the Echo audiofire 4 and the Native Audio Kontrol 1.

The Native is cheaper and has more options, but I am also wondering options put aside, which has better sound. Anyone have any experience, helpfull info that I cant get just from seeing the specs?

Which of these two do you think is the better buy for semi-pro studio,i'll be working with cubase and / or logic and some analogue synths and vsti and plugs....

Thanks in advance,
Sannder