How loud are Dels? We rent and live in the "city" (its residential but on the indian reservation). Our neighbors have chickens and a rooster who crows a couple times a day. But I'd kinda like to be the secret chicken keeper for a while.
My Dels are pretty quiet unless something upsets them. If you have hens make sure to have plenty of nest boxes. They argue over them. They're a friendly breed though I don't pick them up a lot. Rooster don't cross forever and ever. Though a barking dog is more annoying.
Easter eggers are another nice breed and Marans are too.
I don't think any breed is completely quiet. I do have a light Sussex gal and she's pretty good too.