Ive got a TM6900 HD and i'm really happy with it, also got the tm 80CM motorised dish, diablo cam and cas3 programmer
Lots of support on forums for both the receiver and the CAM.
enough HD channels on system.
The TM can also take a sly card which lets you watch the freeview channels if you have one.
You cannot get any of the pay sly channels but to be honest, most of the channels or things you might want to watch will broadcast by some other companies in English.
The TM will only let you record the program you are tuned to on the sat, and even if its a twin LNB feed, you still need to point your dish at the same satellite so i'm not sure that they re any use anyway. What you can do, is watch things on terrestrial TV and record from satellite feed which is usually enough for most people.
The picture quality on HD is stunning if you have a HDMI lead set up.
I have to say, I only watch sport and documentaries and freeview channels now and wouldn't go back to sly or branson at all.
Hope this helps.