Newbie question: what makes a good stud?

What should I be looking for in the future breeding male of my pack? Of the ones I got so far, are any of them good enough?

People usually look for: TII Bases, Combo & RMA Markings (Merle, Tamaskan, Inuit, etc), and High Stats.

I suggest placing your breeding male as your lead wolf or scout as they gain stats the quickest! 

EDIT: Also, keep in mind that once you set your breeding male, it is permanent! You can't remove them unless you pay 20GC. Once they are removed, you can not set them as the breeding male again so be cautious when choosing a stud.

would either one of these pups I got be good? 

wolvden.com

wolvden.com

when they grow up, of course

I would say this one. They have Cream Merle & Black Inuit Unders which are desired markings.

thank you for your help!