I been looking at new pads lately as well; I've been eying the Q-Core both the regular and UL version and one of the Exped.

I vaguely remember reading about Klymit Inertia X-Frame in Backpacker. The article for it might be online if you search for it.
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It is one of the blessings of wilderness life that it shows us how few things we need in order to be perfectly happy.-- Horace Kephart