Digital BW, The Print

I have been planning to purchase an Epson 4800 after reading about the
improved BW results over my 2200.  Are any forum participants familiar
enough with the CANON IPF5000  to make a recommedation regarding BW
capability for this new printer and how it compares with the 4800?

My experience with QTR / Epson 2200 has been exceedingly positive. 
With the 4800, I believe I would have the option of using the Esposn
BW driver or QTR. Is this correct?  Can QTR be used with the CANON
IPF5000 ?

Alan Kushnir