Honestly with the Nixim I see no need for a Obutto.
I went with the Obutto with because at the time I could buy it semi local and save on the shipping. It is very well put together and does a decent job of handling the weight. I do think it would be a little more stable with 24" monitors instead of the 27" that I have on it. There is a little (very little) side to side wobble with it as it is now, plus I cant really get the angle for the monitors I would like do to the arms hitting the center monitor. They do have a new monitor mount (aftermarket but recognized by Obutto) that is made for bigger monitors now. I had thought about getting one and probably will at some point but I have been using mine in its current state for 2 years now and have gotten use to it.
I bounce back and forth between the ECCI 6000 and 7000. I really like them both equally, I started SIM Racing back before there was FFB Wheels so I am still a little partial to Non FFB wheels. Sometimes I feel the FFB gets in the way, if I am out to be super competitive for the night or whatever I use the Non FFB wheel, just wanting to have fun and add as much realism as possible I go with the FFB one. There so easy to swap in out it can be done within minuets so its not a issue. How ever if I didn't already own both, I would probably just settle for the 7000.
I think there is both pluses and minuses for both G27 and Fanatec wheels. With different internal workings I can find good and bad in both, I ultimately used the GT3RSv2 more than the Logi wheels when I still had it. I liked the sort of built in dampening you get with the belt drive wheel.
I would still like to try the T500RS and Fanatec Clubsport Wheel at some point along with the new Clubsport Pedals to see how they stack up against the older Clubsport Pedals. But I have way to many steering wheels and pedals lying around now that don't get any use. 