I wasn't a fan of the adjustables that came on my 34, so I replaced them with "HiViz" tube, light bright style. I like those alot. I am looking at a 20, and am trying to decide on whether to go the aftermarket route again. WOuld prefer to keep stock sights, but I know the standard plastic sights are even less desirable than factory adjustables, so that leaves factory night sights, and glock factory steel sights. Am considering the latter because they are not that much more expensive. Thoughts? Considerable upgrade from plastic? Just as "low profile" as stock plastic? Thanks.