new brooks are actually more comfortable titled upwards (at least thats what ive observed), as it takes a while for them to contour to your sit bones, and an upward tilt keeps the rear end of the non broken in brooks relatively parallel with the gorund. if you cant get it level, yea, you might want a seat post that gives you more range of tilt. I have a campy super record that works well. I havent any experience with the aero ones like you have (if my eyes serve me well), so i cant comment on their functionality.