What you're suggesting only gives you a 2 stop spread between exposures. Generally speaking that range of light can be coaxed out of a single frame without the need for HDR. I think that if you want to experiment with it you'll want to include more frames or expand your bracketing to get more stops.
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When I shoot for an HDR image, I autobracket -2, 0, +2. The goal is to take as many shots as needed to cover the dynamic range of the subject. +/-2 generally does really well. And if you're shooting RAW, that can be expanded another stop both directions, if necessary.
The newer cameras are reducing the need for HDR and bracketing if you shoot at low ISO levels. I've found with the Nikon D800 and D600, the dynamic range is much wider than earlier cameras. DxOMark rates them at 13-14 EV at lowest ISO but just 10 EV at ISO 2400.
I agree with the other comments - bracketing at 2 stop intervals makes a lot more sense than single stops.