Im not very familiar with VIZIO products or their warranties but i so know Asus stands behind their product with no questions asked. There warranty service is great. View sonic has been around a long time, one of the best monitors ive ever owned was a 17" crt view sonic. Its probably the way i would lean myself, considering it has the features you were interested in. Converters tend to screw with the signal and wind up adding noise to the image, or has been the case with tv. I say if you can get all the proper connections on one unit, do so and you wont lose any image quality through adapters.
Vizio may be great but ive never owned anything by them myself so it would be unfair for me to comment either way.

