Thanks a lot for the reply. Well I went for it and got the RX100. I've used it twice since I got it and I think it's a keeper.
I recorded a show in a bar on Thursday and at 30 minutes, the symbol came up to warn it was getting warm. The show ended up being 90 minutes long and it made it throughout.
Last night I recorded a 40 minute set, outdoors in humid Ft Worth, and at around 15 minutes, it popped up, but again, I managed to capture the whole thing. This one I was VERY pleased with, as it was in a very dimly lit courtyard. I know for a fact that my camcorder would have struggled and there would have been a LOT of grain. https://www.youtube.com/watch?v=EQnfVCUgJP4&feature=youtu.be
I generally capture external audio, them sync in post, so the slight break when the file ends is not a problem. I got external audio on the clip above but due to the layout of the band / crowd, it was pretty hard to get an even recording, so it's quite washboard heavy.
So far I've been very pleased.