Large RO Unit

[Jaws]

I'm looking at getting a 1000 GPD AquaFX RO unit for my 700G total volume system. I plan on changing 100G of water once every two weeks plus using it for top off. I have an Aquasafe 100 GPD unit now. I'm just wondering if anyone thinks this is ridiculous overkill and if there are any disadvantages to a large RO unit like this? Thank you.