Before I pull the trigger on a new lens....

Ok, so I'm about to FINALLY make a purchase of a new lens or lenses.  I have the Tamron 17-50 on my a77 and I'm looking at 2 options.....

1. The CZ 24-20 - approx. $1550 used, like new

2. Either the Sony 16-50 2.8 or Sigma 24-70 IF EX DG HSM - Both approx $670 used, like new
   &
   A Minolta 85mm f1.4 - approx $650 used, like new.

For option 1, is the CZ 24-70 worth the premium price?  Will it make me not want another lens close to this range?  Is its IQ worth not having the sweet (i'm assuming) Minolta 85mm f1.4?  For some reason I'm still questioning it, ugh.  

For option 2, logic dictates this is the way I go but will I regret not getting a ZEISS lens.  For the cost I can probably squeeze a vertical grip in too.  I can probably flip a coin between the Sony & Sigma lenses although the Sigma may be the way I go to cover any FF bodies in the future.  Thoughts on the 2 zooms?

I never thought it would be so difficult to spend money like this.  Thanks for your input.  I know I posted a similar thread a short time ago but I want to make sure I'm making the best decision I can.

--
Ernest
a77/a300/Tamron 10-24mm/Tamron 17-50 f2.8/Tamron 70-200 f2.8
/Minolta 24-105/Minolta 100-200/Minolta 50 f1.7/Tamron 90 SP Macro
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