Even a used Cintiq is going to set you back around £1500GBP which is a lot of money to fork out for something to play with, they are pretty neat though!

Unless you particularly need a Cintiq or have the money to spare, I would probably suggest saving a bunch of cash and upgrading to a TFT monitor (£200-£400) reclaiming the hectaire of desk space that your 22" CRT is consuming and get a normal wacom which will sit nicely in your newly acquired desk space, spending £150-£300 will get you something more than adequate.

Take it easy,

Mat.