The best bit of advice I can give you about purchasing new equipment is to
try before you buy!
My Astro Hut is full of stuff I wish had never bought.
Eyepieces, worthless filters and bits and pieces of hardware.
Most of the equipment in this hobby such a personal choice.
Your choice of equipment all depends on how and what you’re going to do with it.

So before you go and shell out your hard-earned money, visit your local astronomy club.
Go to one of the local star parties.
Or visit one of the plethora of online forums.
GET INFORMED!