Edited for off topic!
a) I have seen as many bands as I can. Current metallica live sound is by far the most pristine, clean, articulate live heavy guitar sound I have ever heard live. An untrained female friend of mine commented on that by saying that wow these guys sound better and clearer than other bands (reffering to the vocals) when the other instruments (of the other bands) don't play during breaks! (hetfield's voice shone that day). Having seen the nimes DVD in france 07/07 I have to say that it is by far one of the greatest sounds I like to hear from a live recording. I like it even better than the more youthful but overdistorted and harsher live sh!t binge and purge. Legendary (live sh!t and older gigs)? Sure. That was what the band sounded like then. You cannot expect them to perform the same vocals (which take down the whole tuning of the band if necessary) and they are not using the same gear anyway (not just amps/rigs but consoles, new iso chambers etc). The sound array they are using is incredible. It is easier to feel "part of the band and amps" in small clubs but when did you see metallica doing a small club gig nowadays (yes there are exceptions, secret gigs etc).
b) Two great clips.http://www.soundclick.com/bands/page_so ... ID=7328981
Here is the axe-fx clip. I have a/b ed it several times with the original. Not exact but really good job.http://www.soundclick.com/bands/default ... dID=871937
Here is the master of puppets clip. Plug in is LePou Legion. Free and not based in any real amp. I really like this one.