Advise really isn't my strong point, but here goes.
To me, it depends whether your in this scene to; learn how to code effectively, or get a server running, or possibly both.
It comes down to whether you've got the patience, because in the long run it will benefit you, I suggest just starting your own project, EVEN if, your just looking at other sources, tidying the code up a little and placing it into your own server, the way you organize the structure and your coding style will fit your server, making it much more efficient. Then when you get increasingly better, which no doubt you will after your first attempt. You can re-write etc, like I said depends what your overall aims are.
If patience is not a virtue of yours, I suggest using Hybrids source as a base.
I can't really comment on any public released sources cause they're all just disgusting and I can't bare to look at them, having no actually checked Hybrid's out myself, his reputation implies the coding standard will be supreme and efficient. Great learning material IMO.