Digital BW, The Print

I'm going to upgrade my (Mac-based) digital processing, and I need some advice.  I now scan 
with a Nikon 4000ED into a G4 Powerbook and view with a Samsung 19" monitor and print 
with QTR/Cone inks on an Epson R2400.

I plan to buy an iMac with 20" LCD and 4 GB RAM (max available.)  The Samsung gives me a 
fairly accurate view of what I'll see in the final print in terms of tonal range, but I think I can 
do better in terms of sharpness and color temperature control.  Certainly, the LCD of the PB is 
totally inadequate in relation to the final print.  I assume that the LCD on the iMac will also 
be incapable of being reliably calibrated.

So, first question: is this assumption correct?  And if so, second question: what CRT would 
you recommend as adequate?
TIA.

Harry