I wouldn't be getting this machine for spray finishing any of my projects, thats a dead cert. I would maybe look at getting a HVLP (high volume low pressure) turbine or maybe even the Earlex. Again it depends on your budget. A nice Apollo (said to be high quality, haven't used one.) would be great for a high quality finish. As to would the Earlex (again haven't used one just going off what I have read and seen)
Apollo Site:
http://www.hvlp.com/turbines.php
Earlex Site:
http://www.earlex.co.uk/html/menus_html/hvlp.htm
The original wagner you looked at could also be used for spray finishing.
It comes down to a matter or preference.
At work we use a simple spray gun with a liter pot and compressor. We also have a Pressure pot (10L) and this again works wonders for spraying stains and lacquers.
I would save the money that you would other wise spend on the wagner and take the time to use the paint brush and roller. You can put the money towards a far better unit and will be much more pleased with the results you will get on your furniture.
Hope this help, probably just confused you more. :doh:
Harlan