I just purchased a Composite-Arf extra 330 2.6 (House scheme)

I am debating on whether I should go with a DA-100 or a 3W-100.

I believe that the DA-100's plug wires will force me to cut small holes in the sides of the cowling while the 3W-100 cylinders do not stick out to the sides as far as the DA-100 and I can avoid cutting holes in the cowling.

Does anyone have any suggestions or any information that might help me make a decision?

Thanks