I thought you wanted SILENCE? The H115i is not exactly known for this, not vs an air cooler anyway. Pump noise alone ensures that. I've read numerous user reviews of people not happy about it. If you value silence over the aesthetic, it's something to think about. I would say the NZXT Kraken X62 would be a tiny bit quieter, and it looks nicer IMO.
I assume the HD120 fans are for the case, as that cooler takes 140mm fans.