Quote Originally Posted by Ivresse
Bear in mind that there is a possibility in 3.1, that once you reach a certain level of expertise (185 I believe it is), then Seal of Righteousness added with Seals of the Pure, Glyph of Seal of Righteousness and Reckoning may out-Threat-Per-Second even the mighty Seal of Vengeance.

While that's probably going to be true, that's a lot of talent points and overstacking Expertise in order to make a different Seal worth using. I can't imagine it'd be enough of a TPS increase to make it worthwhile.