As far as soft core balers are concerned... the only one I would own is a Claas Rollant.
If you want belts... I'd be inclined to go with a more modern NewHolland. Deere would probably be my second choice. Vermeer is also a good baler but support can be sporadic in some places.
It's most important to take a close look at what you're getting for that money. 4500 can be a real danger zone for price... as you get everything from really nice weel kept older balers with a lot of life left to some real cheap worn out newer balers that will need another 4500 to make them work... so shop carefully.