Which is the best skimmer?

[TheReefGeek]

I always over-buy my skimmers so you don't have to upgrade down the road.

30" is a good amount of room, but you will be limited by your sump size.

What is the footprint of the section of your sump you can put your skimmer in? I would buy the biggest skimmer that would fit into your sump.
By footprint I mean like 12" by 8" or whatever.

You can see the footprints of ASM skimmer here: www.asmskimmer.com