All the same, you never know what other channels in the upgrade may interest you. We moved up to HD, the gold pack specifically, mostly because we wanted to watch Discovery HD. We went with Gold for the SD programming we were used to with the 180 pack. Turns out, we watch Equator HD more than any other.
Look over the extra SD programming you'll get with such an upgrade. If they don't interest you, hold off on the upgrade. NGHD is not worth it now, but it will get better, and you can revisit the decision then.
I expect Food HD will be in all the metallic packs. That's the one I'm most eager for. If it, or some other upcoming HD, is only available in Gold, you might want to reconsider at that time. A few more HD channels are to be added in the fall.