If you're budget is tight and you're pushing it in getting the PAM317, then opt for the PAM26. That would be my deciding factor if I had to choose between the 2.
If my budget can easily support the PAM317, I'd get that hands down. Otherwise, PAM26 would be the most logical choice budgetwise.
Will you be getting one of them? If so, please do keep us updated
Cheers,
Anthony