Debs, isn't Freesat + HD PVR the way to go? That's the technology route I've been mulling over recently. 
http://www.freesat.co.uk/index.php?page=hd.Main
Humax HDR
Very good piece of kit, but for a lot of main stream channels SDTV Freeview has a better picture.
That is why 90% of the HDR recordings are off BBC HD.
ITV1 LD in particular is appauling on DSAT.
There is no SDTV ITV1 on DSat only low def and occasionally high def.
But then the only programmes I like on ITV1 are in HD (Kingdom, and Doc Martin) it doesn't matter.
Primeval has been cancelled so no problems there

To be honest it is not worth trying to single source TV, we triple source it.
Freeview is generally best for SDTV PQ, Freesat for the HD, also there is the internet in various resolutions, from streaming IPlayer to BT Vision HD downloads, for some people cable TV is an option as well, but that is payed for.
If you find the SDTV acceptale via HDMI for the Humax give it a go, but I prefer the SDTV off the two Freeview PVRs we have (BT Vision is a Freeview PVR with IPTV and was only £30, we don't actually use the IPTV beyond Replay TV, thanks BT

)