to sum up, there are 2 methods to do DVB-T/T2 digital recording - set-top box with PVR function (eg. Draco) or PC Tuner card/usb.
the stb method is very straight forward (suitable for layman), just buy a stb with pvr function + usb hdd... connects them up and u can do timeshift or timer recording. u can record directly in Transport Stream (TS) format, meaning everything over-the-air including audio selections, subtitles, info etc. are recorded into ts file.
pc tuner method is similar, but u need to setup the card/usb and install all drivers/softwares to ur pc... then u can watch tv on ur pc and do timeshift or recording.
one is tv setup and another is pc setup, see which one suits u more.
initially i was thinking of buying dvb-t2 pc tuner too... but due to no supported models then i bought draco stb (+ usb hdd).
the recording is good... u can watch directly from stb or connect hdd to pc and use VLC Player to watch on pc.