Yosemite - You don't have to buy our nozzles of course if you don't want to. I'm surprised you say they are more expensive though. Zortrax's spare parts site appears to be down right now but last we checked it was about 30 euros which is still more than ours. It is especially cheaper stateside since the zortrax nozzles seem to run around $35-$50 over here.
Regarding the 60-degree design - please note that this is just a duplicate of the standard zortrax nozzles (we've cut open a few). Our other nozzles for the makerbots and flashforges are very popular and have been shown to give improvement, and we've simply gotten a lot of requests to make a version for the zortrax. As we understood, the zortrax prints very well out of the box, so we were unaware of the clogging issue you mention. We would certainly be open to making a version with a better angle there, but this first batch we've machined is basically identical to the stock nozzle. It is also entirely possible that the low-friction coating could solve any clogging issue you mention (but I cannot guarantee it of course). So in summary, we believed the zortrax nozzle worked well out of the box and had gotten requests from users for this nozzle, so we've now made it available, that's all.
Giufini - I'm not sure how it would disturb the auto-leveling procedure. Can you elaborate?
Z-Renegade - again, that's great, then you might not need to change your nozzle. We weren't trying to "fix" something that isn't broken, and we understand that the Zortrax is good out of the box. But users do like to replace their nozzles every once in a while (or they try to clean them by themselves with a drill bit which is a bad idea) and then they would like to have a replacement. That's all we're offering.
Thanks for the good questions everyone.