May contain traces of nut
My longer-term plan is to transition to a mini-PC solution running e.g. OpenElec (disto based on XMBC/Kodi). that would be with PCI/USB tuners for DVB-T/DVB-S.
My reason for going HDR-FOX when they came out was that a PC-based solution was too expensive and there were no DVB-T2 tuner dongles. No doubt the situation has changed over the last 5 years.
Like BH and cdmackay, I have looked into a PC-based solution as an alternative but even just a pair of USB DVB-T2 tuners costs over £100 so a second-hand 'Fox is a better bet.
You can get a dual-tuner for about £80, but yes, it's not cheap, especially if you want DVB-S too, as I do.
Still, had the software been up to it, several years ago, I'd have spent the money doing it properly. But MythTV, then, seemed a terrible mess, so I gave up after a few months. I'm sure Kodi is much better...
Between us we ought to be able to come up with a reference design, and if we all use the same platform and software it will help with support and give others something to follow.
We should go at least one better than HDR-FOX though - three tuners, four tuners?
Does an RPi have enough oomph?