What pick would best replicate the same rounded clarity and sweet tone on a classical guitar as that produced by say, John Mclaughlin? I want something that will enable me to play really fast on a nylon string guitar, whilst retaining a very beautiful tone. Any ideas?

I've heard Ultex Jazz IIIs are good for that kind of thing.
Quote by i_am_metalhead
Use your fingernails.

I'm aiming to pursue a jazz style, similar to John Mclaughlin or Al di Meola, wereby alternate picking is utilized for tremendously quick improvised solos. The problem is, with some picks the sound is very tinny.