For more info:
http://www.tcelectronic.com/default.asp?id=1346 - Master X3
and
http://www.tcelectronic.com/default.asp?id=1600 - Master X5
So you can buy the software Finaliser with 5 bands instead of the 3 for only ?143.
Not bad eh?
Of course you need a Powercore to run it on - the UAD-1 still has better plugs coming with it as standard for mastering / compression / EQ.