Aerozine Ceramic Bearing Jockey Wheels for me. 11g a pair for £20 (ebay) with ceramic bearings.
They look to be the same as the Mt Zoom ones but cheaper and available in colours other than red.
They far outlast SRAM/ Shimano alternatives both on terms of remaining smooth and also in terms of wear on the teeth.
They make no noise so there really is no downside. Also they still look good after 3000km so no reason not to IMO.
I also like that the large gaps between the “spokes” of the Aerozine/ Mt Zoom design seems to clear mud/ muck/ grass far better than a standard jockey wheel. Overall, light, cheap, long lasting and perform great. Nothing not to like 😀