QTR-Quadtone RIP

These are all good points. 
That said, Bens decision is wether to buy an Xrite i1 or an 810. 

The context in which I would consider that purchase would be
1) Value for money
2) Service life of purchase
3) Ease of use for intended function
4) Current and possible future needs


Things I'd consider in that decision...
Xrite 810
	Reflection: 		units density
	Transmission: 	units density
	interface:		RS232
	OS support			?
Pros:
	Very Good price
	measure Reflectance
	measure Transmittance
	Density from 0-4
Cons 
	- support / maintenance in the future?
	 -measured reflectance (Density) will need manual entry and possible conversion to other units of measure. Unless you get on top of the RS232 interface from your 810 to your computer and figure a way to use the data it sends. Maybe this is been done already by people on this list.



i1Pro
	Reflection: units: Lab,spectral...  (software needed, but 'Demo')
	Transmission: units: Lab,spectral...  (additional expense for software)
	Emissive: units: Lab... (available with spectrashop software)
	interface:		USB
	OS support		currently supported

Pros
	measure Reflectance
	measure Transmittance
	measure Emissive
	instrument can be used to read ICC profiling patches.
	instrument  / software readout includes the needed L* measurements
	some measurements exportable with Demo versions of appropriate software.
	Strip patch reading options available 
	Maintenance / product life: currently supported hardware.
	USB interface:  currently supported by most OS / hardware
	Transmission functionality can be achieved with a software purchase. 
	more flexible instrumnet than an 810 
Cons
	more expensive!
	extra functionality may not be needed
	
Hope that helps Ben

Regards
Peter Miles