I loved my new pen so much I bought a 4 pack of a similar model from the same company. I also ordered some sepcialty Inka to try in them all, as well as the more expensive American brand that the Chinese pen was ripping off.
The purple ink I just tried is Iroshizuku ink, it is one of the most popular high end inks. I can see why, it days very fast. The color could be a bit richer though. Looking forward to trying my other inks a bit more cause the other ones are a bit less well known but with a long history. Oxblood will be fun to try.
@msmouse Here are the relevant links I ordered from.
The gold tipped pen in the picture (black writing):
https://www.amazon.com/gp/product/B0726231B1/ref=oh_aui_detailpage_o05_s01?ie=UTF8&psc=1
The silver tipped pen in the picture (purple writing), comes in a four pack:
https://www.amazon.com/gp/product/B079KHY612/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
The original pen, not pictured, that all of these are copied from (haven't tried it yet, arrives tomorrow):
https://www.amazon.com/gp/product/B00C5LI7HA/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1