EVF vs. Penta-Prism OVF? If the a77....

Was offered in two models: (1) with it's current excellent EVF and (2) an excellent Penta-Prism OVF , which would you be inclined to buy/prefer - and why??

Obviously the new EVF for the a65/a77 is a big step forward from the a55 (per all the reviews), but for those who have used or tried them as well as used a very good Penta-Prism OVF, wondering which you would prefer...

Thanks, Bob
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Bob (formerly bobmax)