I think you will find many examples of people getting readers with the PN532 chipset working with the pi. ( PN532 is not the name of a reader but is the name of a chip that many NFC readers use. )
Your biggest choice is what kind of interface you will use. Will you buy a USB reader or an RS232 reader or one that uses SPI or I2C.
USB readers are very simple to connect and usually comes with 1m cable.
RS-232 readers must have power and must be correctly connected to the UART on the GPIO ports.
SPI/I2C readers can be found that can connect directly on the GPIO pinheader, but also similar to RS232 versions.