There is a lot more to this than ES v TV. IMO the only way to find out what you like is to beg borrow or buy and try…all sorts. I have been through quite a few and have ended up with what I am happy with…ES 68 and 82º mix.
Good news is XW's Delos etc hold their value pretty well. Questions to ask yourself….
Do you observe with glasses?
What AFOV do you like i.e.60º 68º 82º 100º
What scope and f ratio
How are your sky conditions and how often do you get out
The only thing I would say to buy is a coma corrector….I bought the ES
I mostly use my f12 refractor which gives pinpoint stars all the way and have to have the same in my f4.8 reflector….the only way is a coma corrector.
Then you can get to ES v TV and don't forget Pentax, Denkmeier and all the others.
Matt