I had a look at the illumagic info and they look good to me but being new almost everything looks good! I havent even got my first tank and already thinking of mods. The aquareef 275L comes with 4x t5 tubes in the hood but I've been thinking (scarey! ) that leds might be a better option. From what I could understand of their info the S series would give me the wider range of coral options but unsure on size I would need. The cube is 70cm across and I would need to have it on top of the tank and not suspended. I have no idea if their numbering as in M -45c means the unit is 45cm. Any input appreciated, I have a spare hammer to hit me with so it might sink in:eek