Yeah, I guess I should have specified that what I'm worried about is a platform front rack that attaches at the fork crown. The front rack I used to have attached there and it was possible to get the brake arms to hit the mounting hardware, and where the brake line went across was really close, but the brakes still worked. I just would rather not cut it so close with the new brakes.
I've also run trekking bars, but ended up switching to Albatross. I did like the multiple hand positions on the trekking bar, but I find that the one, main hand position on the A-bars is good for me most of the time, and I can grab them at the bend (even put some grips up there) if I need a change.