I would place it near where you would like it to begin to take off. Sometimes that is hard to do early on when placing corals, but if you like where it is and would like to have 50 more of those guys all bunched up near that spot in your tank in a year, then I would leave it where it is.
The thing will be is what type of reef tank are you shooting for? Mixed, all softies, ect.. If you will be adding a bunch of corals over time then I would start making a plan as to what you would want your tank to look like in a year and what will those corals need to thrive. Visit some of the other tank builds and see if you see some things you like, and keep asking questions.