It's all personal preference really, but but XD series wheels are my favorite by far and most of their center caps mount from the front as opposed to the back. You can run them over your front hubs and it is only three screws to remove the center cap if you ever needed to access your manual hubs.
You can take a rotozip or a die grinder or something similar and cut out the center portion. That works too.
XD doesn't make open caps though.
Most of the open caps go in from the back. I really don't like them