I worked with 16mm on the old CP-16's, they were basically build for news use and were a great camera. You can see where the body design and function were used as a template for the ENG cameras that followed. Specifically the Beta-Cam series from Sony. I now use a Sony XDCAM HD EX-1R for my business, a very good camera for its price, $8000.00 CDN approximately.
For something around $3000.00 Martin I have heard very good things about the JVC GY-HM100U ProHD Camcorder. It works very well with FCP as this link I will provide below speaks too. One thing though I have found that I do not like much with my camera and others of that genre, is the viewfinder/monitor. You do not find really good ones till you jump up into the more expensive models of camera.
http://masteringmultimedia.wordpress.com/2009/01/29/jvc-gy-hm100u-and-final-cut-pro-a-match-made-in-heaven/