Your EX7 is a bit different than mine. However, my idle temps were in the range of 40-45. In gaming, it was up near 60. My concerns were if it was over 60. I don't remember where I read what the cutoff was, but whenever I was getting over 60, I was making sure to take action for cooling.
I would say over 50 in idle is high heat. For gaming, maybe 65-68 is high and over that could be dangerous. Again, I don't remember the cutoff, but I wanted to say it was at around 70-something that systems were shutting off.
Keep this in mind. I was in Europe at the time. There was no air conditioning where I was (quite normal it seems for Europe - or atleast Germany). As such - the house was definitely not as cool as most places are kept here in the US (for instance - my home is kept near 77F).
P.S. - Becuase this is just normal questions and the sort, I relocated your message to the main forum. Trying to keep the four forums organized with only reviews/benchmarks in one, pictures in another and troubleshooting in the last. This one is for the catch all.
Thanks and hopefully someone with a more modern EX7 can shine in as well.