Well there are a few things that I would consider when purchasing a printer.
1) Definitely go for a Laser printer if you are looking to print bulk amounts - it works out to be far far cheaper because the toner cartilage lasts for ages and Laser printers are generally very robust, they are difficult to break and rarely malfunction.
2) What I would go for is a top of the line budget laser or bottom of the pile premium laser - what this means is that you'll generally find two classes - one that is for general home use and another for business use, generally you'd either want a good general one or an average business class one.
3) Consider the toner volume, look around and look at which printers print efficiently - look at how many pages per toner and how much is each toner - work out the cost per page and compare
4) Definitely consider automatic duplex (print on both sides) - it's so convenient!
5) I use a Brother 5340D and it works really well, I actually have two - one's mine and the other one is my dad's and they're both going strong and working well, both are over 2 years old!