[Megs]

not sure about power consumption but the in sump skimmers i have experiance with that i liked are ...

Euro-Reef rs 135- awsome as is out of box, works excellent, though obviously for a system that size you want a larger model.

ASM G6- awsome once slightly moded, and more than big enough, rated up to 1200 gallons, running on 180 gal water volume system.

i also have a zeo-vit reactor, and it has been excellent at keeping my nitrates barely registerable (if at all, less than 1ppm), even with minimal water changes (dose all the suppliments regularly since were not replenishing with new salt to often).

also running T5HO's, love them, using the zeo-vit company bulbs and they produce a lovely color when used in the right combination, as well as much easier on the electricity bill than other lighting options. (previously had MH and PC)