I have voted for Kimís site because it is more allround and it featured a lively C64 community a while ago. His site is the most comprehensive source of information. Intuitively I think 90% of what can be said about the C64 can be found here.
For the Amiga, the games-area is still partly undiscovered and there is not an Ďallroundí Amiga site available (to my knowledge) which covers screens, games, ads, manuals and so on. Although I think the forthcoming Amiga Games Database will be a major step into this direction.