QTR-Quadtone RIP

I'm about to pick myself up a Gretag Eye One.  I figure I would go  
with their "design" package.  This will allow me to linearize QTR  
curves as well as maintain my monitors.  Any reason to pay more for  
one of their other packages, or thoughts on other manufacturers?

Thanks,
Chris

btw I just started using QTR with Ultrachrome inks after printing  
with Piezo inks for the last few years.  The tonal rendition is  
superb, the neutrality within each curve is amazing for color  
inks.....but mostly....the ability to blend between curves makes for  
some gorgeous prints.  That's worth my 50 bucks!