thanks to all for your input
i do run three 6105 now and the noise they are making i can live with that.

if i could run 2 nano wavebox anti synch all my problem would be solved but i cant find a way =D

i will grab 2 mp40 in the used and since they are holding their value it wont be a big loss to try and run both at 30-40% when im at home and full nutrient export when im away working
(i already have the reeflink)