Unicenter's Systems Management piece will certainly do the trick for you, I have worked with a team that has had great success with it over a period of time and across operating system platforms. But it is certainly not the easiest to use. Do yourself a favor, build 'in-house' knowledge of the product and do not rely too heavily on CA's techs. Also, whenever they are on-site, have somebody watch their every move, they will try to distract that, especially if something doesn't work right away...the time when you most need to see what they're doing, they'll try to apply a fix or a work-around and not tell you. There are easier to use products, with better 'direct-out-of-the-box' settings, but without Unicenter's overall power. Unfortunately I don't have any 'direct' experience with Openview to match it against, but it is my belief that Unicenter is the more customizable and powerful product...but you must get to know the software...
Good luck, and by the way, if you are in Philadelphia or South Jersey and need a good Unicenter Technician who has 'ground floor' experience installing and administering the product (on Tandem, Windows and Unix), and dealing with CA Supoport, I recently left a lead Unicenter technician position in Florida to move to South Jersey and get married and I am now back in the Job Marketplace after taking off a little time to settle in with my bride.
Anyway, Good Luck again...
Harry J Guynup