You could look at the 12-50 but to be honest the conditions would have to be perfect in order to utilize any magnification over 25. Mirage usually makes it impossible to see anything useful at the highest mag settings.
And while it's unlikely you will find yourself in this situation, the 5-25 will focus down to 10 yards on 5 power which I think would be useful and more likely to be used. Not sure what the 12-50 will focus down too.
However, the 12-50 is usually considerably cheaper than the 5-25 and I see them frequently on the sale page of the Euro Optics website.
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