http://pinboard.in is my bookmarking organizer of choice. Simple. Powerful. Fast. Initial entry fee (<$10 right now I think), but in my opinion worth it.
Although if OP is specifically looking for something "better" than delicious, I'm not sure Pinboard would be a good fit. I use and love Pinboard, but as far as I'm aware it shares pretty close to 1:1 feature parity with the old del.icio.us service.