Cute Dead Guys is your web destination for exactly that: pictures of dead men that you find attractive. Whether you're looking for pictures of hunks who died hanging themselves or just want to debate what will happen to necrophiliacs once human beings inevitably reach immortality this is the website for you.
Oblivion Mod Manager (a.k.a. OBMM Oblivion Mod Manager) is the fantastic work of Timeslip. Not only can you install and organize mods, but also you can organize your load order and implement multiple types of archive invalidation, with ease.
But in the end it comes down to what you want and what you are comfortable with. Unfortunately, last I heard, you can't have both NMM and OBMM for oblivion as they compete for the same files. Installing NMM breaks OBMM. Perhaps there is a work around now for this but I haven't heard of it. Best of luck to you whatever you decide. Cheers, Greg