Yep, my 720 started hitting 90c when heavy gaming when it racked up the 1st core, still just below its thermal threshold, ended up buying an Akasa cooling stand to knock off 10c, well worth money.
Thanks, your reply is greatly appreciated, especially since you're using the same processor with a different laptop (so I can't blame Lenovo heatsinks). The TJunction for the processor is 100C. I think the desktop ones are 95C, so I guess they took this into consideration or knew it was getting hot. -10C is very impressive. I just placed my order this: http://www.newegg.com/Product/Product.aspx?Item=N82E16834994097
I would still like more opinions =)