If you go with Vertex, get the Vertex IN-280. It has the same pump as the IN-250. But it has a wider neck, and lower back pressure on the pump. Both work good, but the Vertex IN-280 seems to work a little better due to the body design. I have the Vertex IN-250, my friend has the Vertex IN-280. It only costs a few dollars more.
If you have just a little extra dough, I suggest the new SWC 250A with the Askoll 1500. It's an amazing skimmer and super affordable. It fits pretty much every catagory that you mentioned. Plus the resale on the Askoll based skimmers is going to be greater.