Oxford were a good school, although I did distance learning. I can't see how you can really go wrong - if you are surrounded by these guys all day for 26 weeks, you should come out with great grades. I wish I could have done a residential course - I did OK but it would have been much easier doing it full time.
On the recruitment front, if recruiters were to compile a list of the things they were looking for in a new FO I am sure that where you did your groundschool would be very close to the bottom...
Hufty