The real question comes down to the price to performance ratio. Is Infi a better all around steel, yep. However, is it worth twice as much, for the difference. Considering that you're not getting twice the performance, I don't think so.

Personally, I think Infi is best served on smaller blades like the SS4, that'll see a lot of cutting and daily use task. However, the dogfather really only has one job, and that's to chop; it's simply to big for much else in my opinion. So is it really worth the extra cash to do in Infi, that's for you to decide, but personally I'll save my pennies.