Help with seats please

Hi, I wondered if anyone would be kind enough to assist on best seats to choose,
We are flying as a couple and flying lgw to antigua p.economy and returning in upper class for the first time as a treat.We are flying on virgin airbus a330-300.
We would like to sit together in p.econ but with one window seat and don't know much about u.class but would like window, roomy and close to one another , preferably not overlooked !
Many thanks

Most seats in PE on the a333 are good, avoid 21 AC and 21 HK as it's missing a window. If you don't want people tapping the back of your seat then go for 25 AC or HK bearing in mind the noise from EC. If you like loads of legroom go for extra legroom in 18 AC or HK bearing in mind galley and toilet noise. I always go middle of the cabin so for example on the a333 seats 22 AC or HK. I would avoid the middle row which are D,F,G seats. For upper on the a333 go for a window (length of bed is more, more storage and air conditioning) but with regards to being overlooked that's hard to avoid unless on a a346 or a 747. Seats I'd go for would be from 3-6 A or K. Hope it helps

Many thanks gasmonkey98.