Connection between B1 and BI(2004s)

Hi,

I would like to know how to connect between B1 and BI(2004s).

Before BW=<35, there are 3 ways, they are 1)File, 2)DB connect, 3)Business connector.

Now, which way is the recommendation? I think DB connect is better, but I only know about BW=<35. And I am afraid it is changed drastically after 2004s.(for example layout of the views are changed..)

And I have heard B1i is used for connecting B1 and other SAP solution. is it the best to use this?

Kind regards,

Masaaki