Here is want I use for Visual Observations.

I use the Orion/Vixen LVW eyepieces.
Orion Telescope has quite selling them so you have to go to a different vendor to get them now.
They are great for scopes over f/6 and do not work that well with the faster scopes

	3.5mm coming soon when I have a photo of it.

I have the William Optics Bino Viewer that gives you the 3D effect when you use it with my little 4.3" Refractor.
The eyepieces I use on it are the LVW's 22mm, 17mm, 13mm & the 5mm. Of course you need 2 of each to use it.
In the future I will look for something like a 35mm eyepieces to get a wider field of view.
With the 22mm eyepieces I get just over a 2 degree 3D field of view.