I would definitely recommend an in sump skimmer as soon as you are able. Especially if you are going reef. I have a DBH1000 on my 75 and I absolutely hate the thing. Due to it I will never buy a reef octopus skimmer again unless I have a really good chunk of change to spare lol. I'm currently looking at either a vertex skimmer or a bubble magus for the 60g I am planning. And a good rule for skimmers on a reef is that it be capable of twice the total volume of your tank, at least.
But any ways. Definitely get an in sump when you can.