MOM 2005 is easy!
Man this tool rocks! I remember playing with MOM 2000 and thinking this is all too hard. You had to make a call on whether you wanted it to monitor everything (which results in too much information) or nothing (which results in you having to pick everything you want to monitor). Well no more. MOM 2005 installs nicely, rolls out the agents nicely and allows you to just download management packs and apply them with no licensing implications like MOM 2000 had. It also just monitors the important stuff you want to see rather than all the stuff you dont. Much better! Check it out and download it at the MOM 2005 website. Theres even a Virtual Lab for you to try!