While I liked some post-crisis stuff, I too prefer Superman's pre-Crisis self (don't care for stuff like Clark as a jock in high school, Clark sent to Earth as a fetus, the "death penalty for the PZ crooks" thing, plus I liked the old Superboy [the new one's OK, but not the same...]).
For post-Crisis info, the (somewhat plainly named) "Superman Homepage" strikes me as the just-as-thorough counterpart to this website---it has tons of info, FAQs, etc. with a mainly-post-Crisis (though with a few reviews of old pre-Crisis comics) slant. Both that site and this one used together would easily cover all of Superman's existence/history, IMO. (IIRC, someone from that site once asked on here to write said pre-Crisis reviews, yes?).
The Superman Homepage's website is here:
http://www.supermanhomepage.com/news.php