Suction cup or Dragon Mount for big toys?

So im planning on buying a L/XL dildo, but I dont know if I should get one with a suction cup, or a dragon mount. I want to both ride it and attach it to a sex machine.

Or would it be better to buy a metal ring and a toy with a flat base so I can sandwich the dildos base between the metal ring and suction plate with some velcro straps?