Okey let me put it this way.
My needs are as follows.
I have a Sansui 50" k@k TV ( not smart) and horrible speakers
So I have a piece of k@k Acryan playon 3 from Esquire that has 2 AV ports going into a single 3mm jack that goes into my pc to play sounds through the logitech speakers.
What do I want?
A wireless way to enjoy all the terabytes of content of my pc on a TV
Ok, well it's relatively easy then.
Get the FTV2, connect it to your WiFi network. Bare in mind, Wireless N isn't the best for stream high bitrate video, rather go ethernet or Wireless AC.
Your biggest "issue" is what software you want to use: Kodi or Plex.
Plex does all the work (transcoding) on the server (your PC) while Kodi will do any work on your device (FTV2). I prefer Kodi for now, but in a multi user environment I think Plex will be better.
Also, something to keep in mind, if you're gonna use Wireless N and you see that you can't stream video over (for example) 5000kbps without buffering, then you can "reduce" the stream quality using Plex.
What I like about Kodi is the awesome UI and simple file manager. Unlike Plex, I don't need to add all my series/movies to my Plex Library. I can simply use the file manager to browse the files on my PC (over the network) like you would in Windows. Kodi also has the option of adding files to your library.
The library feature sorts out your series, gets sub titles, artwork, episode names, summaries, etc. It looks pretty cool once it's set up.
With Plex you need to have the server software setup on your PC, with Kodi you only need software on the FTV2.
Kodi has skins which make it look amazing, while Plex looks kinda meh (a new design is coming soon from what I've read). Currently using the Arctic: Zephyr skin on Kodi.
So to summarize:
1. Add FTV2 to network
2. Share media drives on PC
3a. Install Kodi on FTV2, use file manager to view files on PC or add files to video library
3b. Install Plex server on PC, add files to Plex server, open Plex on FTV2 and everything will work by itself.