Depends on your budget.
I have a Princess dual stainless steel one. The containers remove as do the elements for easy cleaning.
It also means I can have oil in one side and dripping in the other.
Not sure the Princess is available anymore but there are plenty of others out there (Bush, Braun, Russell Hobbs, Breville etc).
- Dual optional
- Stainless steel. I would recommend for cleaning purposes.
- Removable element. Ditto.