photosynthesis measurement instruments

[cheryl]

We are interested in replacing our ADC-3 open system with another instrument.
Does anyone have any experience/recommendations using the CI-301PS portable photosynthesis system from CID, Inc.?
We really like using an open system which is why we aren't considering the LICOR models.  Any other companies to recommend?
Thanks in advance, 
Cheryl Wilen
Univ. California-Riverside