I think Analogue did the right thing, by not including a controller with the system. Everyone has an opinion on wired vs wireless and gamepad brands.
You get the most wireless versatility by getting a retro-receiver. If you don't like the 8bitdo controllers, you can use a PS3, PS4, or Wii U Pro controller with it.
If you like the feel of OEM SNES controllers, you can use old stock with extension cable. You can get new SNES Classic controllers and use
the Raphnet Classic Controller to SNES adapter with 4ms (1/4 frame) latency: http://www.raphnet-tech.com/products/classic_to_snes/index.php
I don't think the quality of the 8bitdo controllers should reflect on the Super NT. Heaven forbid, if Analogue tried to make their own controllers.