IMHO I like CJ.
Actually no, I know many Halter Horses who aren't bred.Kale looks quite big in the hindquarters and kinda awkward. I like conner and don't see many flaws. But one thing is his legs look wrong. His hooves are also too small. Dwen is pretty but personally I like Diana. Diana is petite and pretty.
For gelding, if you aren't planning on breeding just get gelding over with. Your horse will be more calm when gelded in his halter career. Some stallions will gladly stand next to horses of all gender but some stallions just have a fit. It will make it easier for both of you but if you plan on breeding of course you won't LOL. Also, if your buying a halter horse just to do halter with I would look into breeding. Most people breed their halter horses not just compete