On a strictly Windows network, there is no single application out there that can beat the functionality of SMS. It gives you the capability of using remote control on user's machines from the comfort of your own chair. You can distribute software across the board or to certain areas. You can collect hardware and software inventories to keep you up to date on possible upgrades and people installing software that they shouldn't be. You can also meter your software, allowing you to buy less licenses and still letting your users have all of the tools they need to work.
However, if you're not planning on using most of these functions, I'd suggest buying a couple of software packages that would do just what you need/want to be able to do over your network.
Mike