Oxford is not a big city, which restricts our options. (We thought about renting a cottage in a village outside Oxford, but infrequent bus services and the lack of parking in the Uni make that seem impractical.)
Ideally we'd like somewhere within easy walking/cycling distance of the Uni (South Parks Rd) and central Oxford; being close to my sister (on the southern edge of the St Clements "Golden Triangle") is another factor. So plausible candidates include southern Summertown, Jericho, New Marston, Osney, Grandpont, and the St Clements area itself.
The geographical constraints, however, have to compete with the financial - Oxford is not cheap! - and practical - we want space and light inside, a garden, and ideally a room we can put guests up in.