My slide version of Misty is currently number 2 at Soundclick's Jazz chart ... and I don't really ever play jazz!
Check it out at http://www.soundclick.com/kirklorange
I use a heavy brass slide. Good heft gives good, solid note, but you must use heavy strings. I use 16-18-24-34-44-54 ... I tune my bass string down to D, that's it.
All the best,