As far as Rurouni Kenshin goes, my friend said the manga is way better because it goes into more detail (lol ofc) and goes longer then the anime. Its last few volumes are turned into OVA. Not sure if they tell you how Kenshin dies in manga or not. I only watched the anime. Kind of sad that its only 96 (well mid 90s) episodes. Could've gone into manga arcs more but a lot of people lost interest when most of the episodes (like 60-96) have no arc plot in them or were fillers.
I've pretty much found any show I want to watch on OVGuide, they have lists of tons of other websites which are mostly pretty good, most of them seem to be streaming. As for Kenshin, I'm getting kind of tired of it, I just wanna watch ma Bleach. I just wanna see Kenshin's master fight more, he's too awesome.