Hi Mark,
I have a CTech5000HD, excellent machine, no complaints as yet (2 months ownership;-) it does not interfere with either a stacked-up PVR (the rather feeble BT VISION one) or with a BT Hub and a TIMEMACHINE. I have also connected (serial) my old receiver ECHOSMART from CTECH5000HD in another room, slight loss of signal, but otherwise OK (of course both need to be on the same satellite;-)
Good luck,
Dr Rod