I just want to make sure before I do this. This is a low-line Kenmore singe wall oven. Spec plate in door says: 120/240 3.4Kw. Installation guide calls for a 30-amp breaker. 10/3 is rated for 30 amps. Approximately a 20' run.

Does this sound ok, or should I go for #8/3 or #6/3?

Btw, thats 10/3 w/grnd.