Hi Ghost, I went through same headache as you, so here are the dimensions :
2013 : Height - 24" (with cup), 20" (without cup) Pls allow 1" clearance from cabinet for lifting of cup to empty kopi-oh.
Base : 4"x 6.5"
2014 : Height - 27" (with cup) - 22.5" (without cup) Pls allow 1" clearance from cabinet for lifting of cup to empty kopi-oh.
Base : 4" x 6.5"
Marco Skimmer is shorter both for the Model 200 (1000Ltrs w height 21" w cup) and Model 300 (800Ltrs - height 20" w cup).
Dun forget to take into consideration how you are going to put in/lift out the skimmer from the sump as you may have to tilt it to get it out. So sump clearance from cabinet must also be noted.
Hope above help you.
Clownfish is right, get the bigger one if can fit as $ is only abt $10 diff.