Hi, sorry for late reply,
When I went to Bali, I stayed at Kuta area and I enjoyed stay in there, actually I am not party person but the noisy don't reach to ur room so you still can rest peacefully. I reckon you to stay in Kuta area because it's so strategic for you cause many restaurants and cafe in there and many shops too. And more info to you if you stayed in Bali long enough, you can go to Nusa Penida or Nusa Cenengan too but you need boat to go there.
And about the beaches that I reckon to you before, yeah definitely those beaches are beauty.
is there anything you need to know more, you can ask me again hope my answer can help you though