[KoopaTroopa]

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My needs:
- I want to be able to stream movie files (often in MKV format but not always) that I downloaded from my PC over to my Home Theater and TV from that same PC.
- I also want to be able to use my Netflix account. Previously accessed Netflix via my WDTV live box.
- Want to use wired connection to my new Streaming/Media box. No Wifi, although the option can come in handy as a secondary feature. Hardwired connection is better.

Some say use a Mibox. I cant use mibox as it does not offer a wired network connection option. I read about the prospect of using some form of USB to Ethernet dongle to provide a wired Ethernet connection option with the Mibox? JUst not sure how affordable that option is or how stable and flawless it would be.
Some say Raspberry Pi with some software on it etc.....
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I would recommend the MiBox.

The USB ethernet adapter you describe is only about US$5-8 and is flawless.

I use it to stream content from a NAS box that is a bedroom at least 15m away from where the Mibox sits, streams content perfectly (various types of files, including MKV). You didn't say if you need 4K, but it would be able to stream those too over the same Ethernet-connected network.

I wouldn't hesitate, it is an excellent solution for Kodi + Netflix (+Youtube) in one box, with a class-leading remote.