I have a Brothers HL 2140 laser printer that has been working wonderfully for the past 4 years. Changed the toner once so far and its still holding up nice and strong. It's low profile, fits under my desk nicely, has OSX 10 drivers and I bought it on sale at Best Buy for $50. Best investment ever.
+1 For the cheap Brother Laser printers. I think in general the most common one is the HL-2270DW which is what I had. It worked amazingly, in fact I liked it so much, my next printer was/is a slightly better Brother, this one has a scanner and small screen (HL-2280DW).
Looks like the HL-2270DW has been phased out. I found one for $150 on Amazon, which just isn't worth it when you can get a better one for that. That HL-L2360DW looks nice. Only $120 at Best Buy right now, plus a $20 gift card. Looks similar to the 2270DW, but faster. BTW, my current Brother works fine, wired and wirelessly, with my Mac. No reason the others wouldn't, when I belive they all work the exact same.
I'm using a Konica Minolta Magicolor 1600w. It happens to do color, but I purchased it for the same purpose you probably are looking for. Fast B/W text. It does it well, but unfortunately doesn't directly have OSX drivers developed for it. Have to install the 1680MF drivers. Works perfectly otherwise though.
At the time, I did research and at the time it was the fastest clean and cheap b/w laser printer I could find. Only feature it doesn't have that I wish it did was duplexing. I guess having a Cat5 connection also is nice, but not something I care about as much as duplexing.
Another +1 for the cheap Brother. Friend of mine got one a few years back. I liked it enough that when it came time to replace our 10-year-old inkjet, I bought one myself. No regrets. Wireless, Mac friendly, good quality, quick printing. The starter toner pack should last us another decade with as little as we print.