Until Roger responds to your question, let me provide my opinion about your skimmer question.
Given your current situation and possible upgrade in the future,
I would recommend you buy Tunze 230/3 skimmer that is suitable for your current and your future 125 gallon tank.
This skimmer is in-sump model that can handle up to 300 gallon tank. Also, as you may know this skimmer is known for its gentle mechanism toward plankton.
I believe you will be happy with its quiet performance and ease of maintenance.
Happy reefing!