I have fallen in love with the idea of a 3-mm eternity (or half or three quarter) band in either white gold or platinum. I would wear it alone on the right hand. I love the modern look of princess diamonds in this setting but am concerned that round brilliants in channel settings will sparkle more. A reputable local jeweler can source princess cuts and work with me to make the ring I want. However, they DO have a channel set full eternity with round brilliants that I tried on and just love (and can’t stop thinking about). Should I go with the RBs since I know I love everything about the ring instead of running the risk of not liking a custom design? (Bonus: The RB full eternity is a size too large. Perhaps they can add beads so it fits now but could be removed if my ring size changes?) Thanks for the input!