Im tellin you extreme mechanical filtration and a good maitenence schedual on the mechanical filtration media is about the only way you are going to get some good results.
Your best bet will be disposable cheap dollar store sponges to take out the big crap, fallowed by reusable micron bags to get the water nice and clear (probably 400, 200, 100 and 50 micron bags....ya a series of 4 bags should keep the water crystal clear and limit some of the maitenence) This should take all the crap out of the water and allow your bio-media to not get full of it really reducing your work in the end.
Probably rinse sponges and micron bags weekly or bi-weekly at the most and just switch out the sponges when they start getting bad (found them like 15 for $1 at dollar store)
what did you have in mind for your filtration?