I did have one for two days. And also a Tamron 24-75 f2.8 . Was not a fan of the build quality, so I returned it.
Any "wider" angle lenses in this range Ive owned were close to being aperture 4 anyways (coming from an EX 12-24mm Sigma), and I shot for about 3-4 years without needing anything in the 2.8 range (at that focal range). The 70-200 2.8 IS L makes up for it and eventually the 24-105 f2.8 L will be joining my bag as well. Never been a fan of Tamron or Tokina build quality. Not saying they are bad glass, just not a fan of holding one.
Sorry to dissapoint

Maybe a 5D MarkII will become my main body in the future

After all, I did sell my entire Nikon rig.