Reply to Focusrite 2i4 vs. Onyx Blackjack?

Hey guys, just in the market for a new usb audio interfaces, and my research and budget has narrowed me down to these two choices, couldn't find many posts comparing the two, so if anyone who was owned either of these could point me to the right direction? I heard that the Blackjack has some driver issues? Other recommendations are welcome (anyone heard anything about the Novation Nio?

Thanks in advance!