For my two cents, always look for an index fund first. Those are going to be the lowest expenses, and they are going to track the market dollar for dollar. While some funds can beat the market on an annual basis, they aren't going to do it on an ongoing basis. It just doesn't happen.
Also don't worry too much about YTD returns as of now. With the market correction currently going on, gains for the year have been pretty well wiped out, so that an index being slightly down on the year is to be expected.
You are doing a great job of saving for retirement, but I without knowing your financial situation, be sure that you aren't accumulating consumer debt at the same time, otherwise you are giving away future spending power anyways. Pay down your debt by highest interest rate to lowest. Move down your 401k contributions a bit if you need extra cash to do it.