If a weapon that can end all life on a planet isn't a pandora's box in your book, GreatWyrm, what is? Also, you weren't insulted, that was an argument to your argument.
But back to the topic at hand. Just because a computer if fast and has a large memory doesn't mean it would be conscious (whatever that is). It would just mean it's fast. Would a DNA computer evolve? Only if it copied itself and the copying were imperfect. Since computers need to be very exact, I do not see how errors in translation would be beneficial, ever, nor do I see why a computer would copy itself.
A diamond CPU was made recently that ran at about 100 gHz. That's 50 times faster than my computer. They could feasably be mass produced a decade from now. And they will be, since we're reaching the limit that silicon can go to, for if processors run much faster they will get hotter, and the silicon will melt.
Wired Article on Diamonds and Diamond Computing