ummm what are you saying? Who would you cast then? I mean the actors that played the roles we love and cleary it wouldnt be buffy if recasts were made ....
its hypothetical, "who would you cast if there was a movie and non of the orignals could play the parts?"....
You don't recast perfection, especially when some suggestions include
Buffy Summers = Jennifer Garner or Jessica Beil
Willow = Katherine Hiegal
Xander Harris = Chris Klien
Tara = Michelle Willams
Oz = Chris evans
I was simply making a general observation before on how some of the choices were, quite frankly, silly but since you want my opinion, I'll give it.
Buffy played by Jennifer or Jessica - ok. Well these two suggests are wrong for many reasons, inluding the short and blonde that was imperitive to the core theme of Joss' show.
Willow played by Katherine Heigl - seems to me you're just pulling names out of the air of people you like and to heck with what role so long as you can cast them. This is not to say Katherine isn't a good actress its just she just doesn't have the right vibe to be Willow and OMG on what planet do you live if you believe Michelle Williams would be the perfect Tara to partner Heigl's Willow.
Interestingly, Michelle would make quite an interesting Willow.
Xander Harris by Chris Klein - If you need me to spell out to you why this suggestion is SO wrong then you really need to look again at the wet drip of an actor again.
Oz by Chris Evans?!?! Again, he would be more suited to Xander but as Oz this is truly shocking as a suggestion.