Plan B for my 190g

[Ruth]

Well I have been rethinking the waterflow on my 190g. I am turning myself inside out about drilling it and am really not comfortable doing it. Soooooooooooo What do you think of this?
Going with 4 tunze 6100's on a controller instead of the closed loop which I planned on (powered by a sequence barracuda and Ocean Motions 4 way)
This will give me over double the water flow.......and........I WON'T HAVE TO DRILL MY TANK! I would attach them with magnets so would be able to have 2 down low in my tank and 2 up high. I think I could hide them in the rockwork somewhat (still want to be able to access to clean and service) so the only thing that would be visible and probably bug me somewhat are the cords.
Input and suggestions welcome please.

Thanks