If you are looking at the ASM skimmers, I'd go with the G4 for that size tank. I think you'd be pushing the limits of the G3 for it. Another option is to check with CB Pets on the new CoralVue skimmers that they just got in. They are very similar in design to the Euroreef/ASM skimmers and appear to be much less expensive. There's a thread under the Retailers Corner called CV Skimmers if you want more info.

For flow I'd go closed loop , or go with Tunzes or the less expensive Rio Seios for flow. So far I haven't heard anything but good about the Seios so far. Either of these pump setups could give you good flow with less power to run them over the large external pumps for closed loop.