I had an M8 right before I switched to the 3D.

The 3D fits my hands much better than the M8 did.
The only other radio that feels close to the 3D is the 3ps.

It depends on which version of the 3D you get. One comes with Nicads and the other model is made for Alkaline. You can buy either tray and have both.

Performance is better with the 3D and DCX Rx.
The DCX is DUAL CONVERSION.

You can also get the Spectra/Xxtra combo and never have to buy a crystal and get all 30 ch....