which towbar?

Hi. We've just bought a Mondeo Estate, with parking sensors, as our towcar and need to have a towbar fitted. I have phone 3 different companies and 3 different responses. I have an alko hitch.

1: All I need is a nomal non detachable no special wiring

2: I  need a detachable with alko ball, I could use deticated wiring if i want

3; I need a swan neck non detachable which will be compatible with alko hitch. Again I had to mention the dedicated wiring and he was more forthcoming with the benefits ie traction control, lights warning

I would be really grateful for some guidance on:

1 Do I really need detachable, the sensors seem quite high up

2 Is it really better to have dedicated wiring with software update

3 what's best swan neck or t'other sort