Digital BW, The Print

I have read so much good about the Imageprint 4 Rip, and 
consider to buy one for my Epson 7000 to use with MIS FS / FS-N 
inks.

Have any of you compared the results from the Piezo plugin with 
the output from Epson 7000/Imageprint 4 ??
Is Imageprint really as good as Piezo (no dots, smooth tones 
etc.) ?

Do you know if the Imageprint 4 is ready for Mac ?

How much does Imageprint 4 cost for Eps.7000 ?

Bjorn