Advice please - whats best "prosumer" level camera for shooting live music gigs?

hi,
more of a sound question I think....
I want to do footage of my mates live gigs, put up some vids to promote them a bit (as they're pretty useless at that to be honest)
Not experienced at video at all....
My problem is sound, it's always awful. Its Punk music so not some gentle symphony orchestra affair (no jokes about taste please

I get the sort of scenario you see with everyones personal footage landed up to youtube of live gigs really...I've tried with a couple of basic cameras at home (Sony, ixus, iPhone...) dreadful distorted. Vid quality isn't worst (funny iPhone not bad at all) but sound is the pits

I'm guessing the real answer to this is to record off the sounddesk separately (problem is thats not always possible/feasible) but just wondered if there was anything in the current crop of affordable handheld devices up to something like this....

thanks