Delidding is the last resort in my eyes. Sure, if you want to void your warranty and lose the ability to get a new chip with the tuning plan, be my guest, but I'll be sticking with upgraded cooling solutions. Delidding could net me a good 15-20C drop in temps, but it's not worth it to me because by the time I hit 95C at load, I'll be using more voltage than is probably safe. Not to mention I stress test with x264 which is real world load temps.
There was this guy at OCN in I guess the delidding thread where he posted an entire convo with an Intel Rep of RMA'ing a delidded chip through the tuning plan. The rep said that all they need is the IHS placed back the way it was and they would consider it. It was sometime back, so you wont necessarily lose your tuning plan.
LOL, having a good chip doesn't serve as being a genius in overclocking knowledge. Oh I forgot, that's what people think these days.