Thanks, Tray Surfer, that's really helpful. I'm not bothered about the lounge, we have a connecting flight to SFO and doubt we'd have much time to enjoy the lounge anyway, so that's not a factor. As for the cabin, seats, and noise, then I think our current seats are probably good ones. They're not next to the galley but close enough that my partner can visit easily if she needs water or assistance with anything (I'll be there as well of course!).
Good to know there's direct access to the upper cabin. CW seating in the lower cabin appears to be over what I assume are massive wings, but I enjoy looking out of the window and the upper cabin seems much better suited for that, especially the forward cabin.