We need people who can provide a critical, informed appraisal of three quite advanced cameras. If someone has not used a DSLR much before they're likely to think they're all great, but if you're in the market for such a camera yourself and you feel you could make a useful contribution by all means get in touch.
Alternatively we will be doing this with other types of camera too (inc entry level models) in the near future so you may prefer to join us on one of those days out.