I doubt anyone will be able to give an unbiased opinion on such a subject. There will be ardent oxford supporters and naysayers. The only useful advice i can offer is to find the schools which most appeal to you, and visit them. You will learn nothing about how you feel for a school until you visit it.
Oxford, from what I saw while there had fantastic facilities and was very professional, but since I haven't studied there i can't give you any idea of training level although I'm certain it's very good.
Again I honestly suggest visiting the major schools (IMO Cabair, CTC, FTE, OAT, AFT but there are many more good ones) and making your mind up on how you feel about the school. They could have the greatest instructors in the world but if you aren't happy with the surroundings chances are you won't do as well as you could.
All the best.