WhAt should I anticipate having to pay for the mounting and balancing?
There is no reliable way we could answer that collectively. Numbers range widely. You need someone local to guide you.
I ride a 2009 Shadow spirit c2
Then it's a 750?
Also any recommendations on tires?
Dunlop D404s suck unless you've got yourself a garage queen.
Metzeler ME880/ME888 are what I've been running for years. LOVE THEM.
Pirelli (MT66?), Michelin (Commander II) and even Bridgestone (Don't know the model numbers) also get recommended here. Maybe some other brands, too.
Bargain shoppers recommend Kenda and possibly another brand. (I don't pay much attention.)
A few folks will recommend a car tire on the rear. That could incite a war of words. (Again, I don't pay much attention.)