Certainly keep Play services and the Store. You will break apps that do licencing calls on the market if you do.
Google Maps... honestly I haven't found a worthy alternative. Google Maps just has everything nailed as far as I'm concerned but feel free to explore the market.
Moneykick... is there an app called Shopkick on your phone? This is a not a system app at all and can be removed.
Feel free to stop/remove those Sprint Apps. They have some purpose on sprint service so are not really bloatware or anthing but not needed at all.
If you want to remove these things, there are great apps to back up and restore apps, as well uninstall any app on your phone.
Honestly one of the best ways to streamline Android experience is to run a custom ROM like cyanogen, or a stripped down and unbranded stock ROM for that phone. I do not know how comfortable you are with rooting your phone and putting a custom OS on it. I could give you my contact info if you wanted help with the process but I warn it is in major warranty voiding land.