Go for a laser. Most inkjets put out sloppy output, even for school, and the ink often runs down the page if you get caught in the rain. Check the hot deals forum for deals on lasers. There is a cheapie minolta laser at Costco for $100, and there WAS an 18ppm 1200x1200dpi workgroup quality Minolta laser (you know, the $600-$1000 kind) with a 5000 page STARTER toner cartridge for $200 at tigerdirect. The brother HL-1440 for around $200 shipped is also a deal, and can be found on the hot deals forum. I have seen that brother as low as $150 shipped with coupons and a pricematch.
As for whether to get an HP, if you can afford it (or find a real deal on one like I did - anyone remember ValueAmerica and the cookware and teapots for free ValueDollars?) go for the HP. If not, there are cheaper decent alternatives such as the brother.
Nack