Okay, I found a good site while looking for some Naruto maps that has some good information and comparisons between the Byakugan and Sharingan. The site is: http://www.anime-dojo.free-websites.com/catalog.html

Just something for you all to look at and hopefully get some ideas from. For me, though, it really just seems like this fight would come down to what techniques Itachi would start off using. I mean, he'd probably be smart enough to know not to get close to Hiashi, and so could use plenty of jutsus against him. But Hiashi's defence might be so good that all jutsus would be in vain. Who knows.