Searched and couldn't find anything....60K check up?
 

What's the most important fluid (s) to get changed during this check up? Tranny fluid, brake fluid? How much did you typically pay for something like this, and would you take it to a non-infiniti shop to get this taken care of?

have you read your owners manual...? it will tell you what all needs to be done...

as for the price im not sure... if you have a shop you can trust to do the work... go for it... it will be alot cheaper than the dealer... a Nissan dealer can do the work and will be cheaper than infiniti