Rooms in the mansion are quiet, in our experience. Top floor is nice. I would book pool view if you want to be near the quiet pool. As far as convenience goes, we don't find a huge difference based upon view, otherwise. There are two buildings that house the RR - Oak Manor and Parterre Place. Oak Manor is somewhat closer to most amenities. Parterre Place is the furthest mansion from the themed pool, closest to POFQ. You can always request the mansion that appeals to you the most.
Personally, I don't see a need to pay extra for a particular view in moderates or value resorts. Your door will open to an exterior walkway. There isn't a comfortable place to sit and watch the view from your room. There are no balconies. SO, of your choices, I would book garden view and save a few $$.
If you go to portoleans.org you can look at a map of the resort with room views and locations. That will show you where everything is located and you can decide which area that you feel would suit your party the best.
We usually request a room on an upper floor and near the foot bridge, so we have quick access across the river to the main building. OR - depending upon what you like - You could also request a room in Oak Manor closest to the theme pool, for example.
The other option, as mentioned, would be to book preferred in AB. Those are the most conveniently located in POR, IMO.
Enjoy! POR is awesome!