Actually I think for the price, you would struggle to assemble your own 66gallon, 10mm rounded corner aquarium with 6x39w T5's, 8x led's, 3600lph from twin circulation pumps, a full sized turbo skimmer injecting 300lph air and 1000lph water flow, complete filtration and all built in to a timer controlled, fan cooled hood with one plug and a nice control box. All sat on a chunky cabinet rather than a knock down stand.
The skimmer alone is a really serious bit of kit in the M250 and I know I'm biased but having seen the systems running for a year already I can vouch for the ease of use and effectiveness of the system.