Why FTV and Not a 802 device
I been using different boxes like the Matricon and RK3188 based ones. Rockchip suck at video but Amlogic excel at video playback. The problem is buggy firmware and that my friends is what makes or breaks a device. I was looking into an S802 but the only worthy one seems to be the upcoming Minix 8 with S802-H. One thing I like about the Roku and FTV is how well they behave and I don't miss the buggy Chinese devices' firmware.
I own a FTV (living room), a Roku and a Chromecast (bedroom, Roku for almost everything and the Chromecast to stream XBMC from android using Moliplayer and Y2Cast free app). Even though Roku have a dual core, it kicks any other box including the FTV at handling video and working with Plex. If there was XBMC for Roku I would considered it the perfect box.
The FTV handles video very well but the user interface is not as smooth as the Roku. Plex sucks on the FTV but XBMC works great (I'm on 13.1 RC-1). Instead of using Plex on FTV I now access my WD My Cloud storage using XBMC via SMB and it works like a charm.
So in short, I will keep my FTV as I'm very pleased with it specially because of XBMC, except if in the future there is an XBMC channel for Roku (doubt it) then I will trade my FTV for another Roku.