Right there with you mate =)
Thinking of Wizard non-archon for solo push, but archon for speeds and such.
Necro on the side when I have time. Necro will be a lot of fun, but I don't feel the class is optimized for pushing paragons as efficiently yet. Maybe a few builds will be capable for T13 come season start, but seeing as Necromancer is mainly a pet and corpse - based class, it seems unlikely that these would be as speedy as DH or Wizard.
Plus, the Necro's blood set, which can run without pets or corpses, doesn't look as strong as other class options for speed runs. Would love to be surprised though.
Edit: Looking like necro can do solo speeds after geared up relatively quickly, almost comparable to wizard. Saw a few corpse based speed builds as well. I've been proven wrong. Yay! I still think early season wiz or DH would be slightly faster though.