What Is The Best Way To Cut Existing Case Fan Guards/Grills?

[Major_A]

Just bought a new case (Antec Three Hundred). I don't like LEDs or side windows so this case is fine for what I wanted. The side panel has an intake ready for a 120MM fan but I honestly don't like existing case grills. I have two hole saws (80MM and a 92MM) that I usually use to remove the precut grills. However, I don't feel like shelling out the money for what Lowes/Home Depot wants for a Bi-Metal 120MM hole saw. What is the easiest method to remove the existing grills on the case?

Here is a picture of the side (I don't have the case yet, I found these images on the net).

Here is the filter that I bought to use as the fan guard.
http://www.bestbyteinc.com/index.html?s ... AN-AFG-12B

The rear case fan I plan on using a run of the mill wire grill.

Run of the mill wire grill.

The case has two front intake fans.

I don't plan on running any sort of grill here. I don't foresee anyone sticking a finger in any either of these fans.

[Alathald]

Easiest way is a dremel. You could probably use nippers but you'd end up with jagged edges.

[Major_A]

I'll try to track down a Dremel. If I can't I guess I I'll have to use some wire cutters and a metal file to smooth the edges.

[jedihobbit]

So what did you end up doing? Hope you managed to aquire a dremel.........

[Major_A]

Nope, wire cutters. About a month after doing the cutting I broke down and bought a Dremel.