Having studied at the Institute of Contemporary Music Performace until July of this year (I was on the higher diploma) I cannot recommend it enough. I don't consider myself to have played bass until I studied there.

Beware though, it is not a technology type of school recording wise. It has some great equipment, but the focus is on performance, and it really stretches every aspect of your playing, as well as focusing on the subtlies of most genres and techniques relevant to gigging bassists (although strangely playing with a pick was never mentioned/encouraged. It was just an option that many players were lacking

)
One thing I enjoy is that you can book a practice room at any time, even if you no longer study there (something Im making liberal use of

) so a good place for band practice; free and kitted. and the teaching is second to none (or very few)
I dont know about those other places, but I definetly recommend this one. Sign up quick though, Dave Marks (one of the teachers there, you may have seen his youtube videos?) said to me that he's currently trying to arrange for Victor Wooten to come in and do a clinic.
