I have a 125 that has been my reef for some time now (about 2 + years) but recently found a 180 reef ready. I'm happy with my 125, but more room in the 180 allows more expanding with corals and tangs. If I do the upgrade, I'll have to take down the 125 and place the 180 in it's place (no room for both). What sounds better: stick with less hassle by keeping my current setup and buy more corals or get the 180 and start all over again?