Having seen this machine, I'll say this:
It's pretty nice, and it's in Colorado, so savings on shipping may be something to consider (compared to getting a cat from AK or CA or elsewhere)
As I recall, belting and grousers were good, which saves, full cab, which is nice and ran well.
As far as speed goes, I think the limiting factor will be HP, not so much gearing. With the 3/4 tranny rear end setup, you will always find a gear that works, but you will be limited to that gear as catching another one may not be an option.
FWIW....