I am currently in my 1st year at Warwick studying maths. Externally Warwick is regarded very highly by emplyers and other academics as having an excellent maths dept. Internally it is also recognised as one of the best depts in the university. Just looking at the higher entrance requirements quite clearly shows that the only thing that means Warwick is not higher than oxford is the fact that oxford has the name "oxford". Its reputation alone means it attracts brilliant students, professors etc but so does Warwick. In academic circles it is very highly regarded and has some very famous members of staff (Ian Stewart for example). A university that has only been in existence for 40 years cannot hope to compete with a 1000 year reputation that has been ingrained into peoples minds. It's hard to imagine when you're at school what necessarily uni will be like (at least it was for me) and the most important aspect is the course. Really university is far more than that though, you will be living, cooking, eating, socialising, partying...and working there. I know a couple of friends who went to oxbridge, hated it and have now left, reapplying to places such as warwick for next year. Thats not to say that oxbridge isnt for everyone, obviously for some people it is exactly the right place to be but all I am suggesting is that you think hard about what exactly you want from university.