Are you still on a Mac? If so I would look at Willems site - he has Toetag, which looks pretty cool to me except I dont have a Mac. And he has some of his own super-cool compilers (multi-threaded vis tool)
If your on Win-blows like me then I would use Worldcraft 3.3 with the Quakadapter, which sets you up with all of the compile tools which I would use unless you want to use colored lighting, in which case you will need to use Tyrlite .99e, or hmap2 tools (Lordhavoc of Darkplaces fame) which I dont use bacause Darkplaces Quake port is pretty much a different engine all together.
For an overview of the tools I would check out AguirRe's site - he made the best tools (although they are included with the Quakadapter package)
Some people get some wierd performance (GPU driver related?) with WC3.3. A lot of guys use GTK Radiant 1.4, but not me. You might want to look into that, if you arent keen on the Hammer style editor. Or you can use Worldcraft 1.6 (a few people still use that thing), the BSP editor is meant to be good and QuArK editor for crazy people (its meant to be pretty powerful but I couldnt figure out how to use it)
Meh - links, er......
He has some very good info on his site, read Quake 1 Tooltips at the bottom of the site.
Heh - would love to see your ancient maps too !