Canon vs pentax : in the long run

[Reptilezz]

Heyah,

im looking at getting my second camera this chistmas and have decided between the canon 7d and pentax k5ii. I do almost exclusively wildlife shots and my main wishes are good noise performance, fast auto focus and good image quality. I know the k5ii has the advantage of image quality and noise performance, but is the autofocus too slow for birds and jumpy animals? Also in the long run would it be wise to go with canon? Or jump into pentax and see what else they have to offer in a few years?
cheers