I am confused.. and need some little help here guys.

How does the ta2024, ta2020, and ta2020MKIII compared to each other? Need a comparison between them to decide which one to go for..

Does the increment in watt from ta2024 to ta2020 makes ta2020 better? in terms of?
I have read somewhere that ta2024 sounds more natural and musical, while ta2020 provides better low end with sacrifice in musicality. I don't mind the low end. I am more to the balance of everything, and the flatness too.