Rugged machines are very good. You don't need to worry about carrying them from one side to another or even worry so much about where you are working with them.
Recently I've started liking macbook pro because they are also tough. Mine survived in my hands through numerous falls, rain and hot sun exposure.
This year I've left it in the house for my 2 y.o. kid to play and see the kid movies on youtube. He manages to treat this mac even worse than I did and the machine still works ok.
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Albeit not kids-proof, I'd still risk going for the panasonic machine. I like the tablet support and the long-lasting batteries.