Lpc2000

Hello 

I will buy my first ARM board in the next week (I'm a newer in the ARM 
World) and the main question I'm asking is: Which JTAG-USB must I buy 
and What are the difference between them:

There are U-LINK from KEIL and J-LINK from IAR or simply a JTAG 
through the parallel port?

I will work with LPC21XX and LPC22XX and and I've got the IDE from 
Keil (use with GNU and keil compilator)

Thanks a lot for your help

ONAP