I understand the need to conserve energy, and I realize the power consumption in standby is greater than any other manufacturer reports, but consider the following.
The Toshiba RD-XS35 consumes 35W when operational, 17.1W while in standby with the front display on, 15.1W in standby with the front display off (assuming you don't need the clock display, you could certainly turn this off and save 2W of power).
Now before you decide this is too much power consumption, take a look at the power consumed by the other manufacturer's DVRs
Panasonic DMREH55 (to my knowledge, this is one of the only other DVRs that uses TVGOS). When operational, the DMREH55 consumes 33W and 13.5W in standby.
Pioneer DVR640HS consumes 37W when operational and .29W in standby if the front panel display is off, but with no TVGOS, this explains the low standby power consumption.
Sony RDR-HX730 consumes 40W when operational. Standby power consumption numbers are not available, but you can assume it is low since it has no TVGOS and a thermally activated cooling fan.
LG LRM-519 consumes 65W when operational. Standby power consumption numbers are not available.
Philips DVDR3455H has the lowest operational power consumption at 28W and < 3.0W when in standby. No TVGOS explains the low standby power consumption.
So what are the options? Another DVR? Not so fast!
I've read reviews and personal accounts both here and elsewhere. Add my own experience with the RD-XS35 so far, and I'd say there isn't another unit out there with as many features and with PQ as good, for the mere $250 CAD I paid for a brand new unit.
I was almost certain I wanted the Sony RDR-HX730 until I found out it can't save the timeslipped video. The Pioneer DVR640HS (to my knowledge) can't pause live TV, a deal breaker for me. The Panasonic DMREH55 is out of my price range and the others are reported to have poor picture quality, poor functioning timeslip modes, poor editing features, and bad customer support.
The RD-XS35 is a great unit. It has a steep learning curve, but now that I know how to use it, the features are really worthwhile. Picture quality is excellent, timeslip works better than expected and the price I got was excellent.
Is the fan annoying? Well, yes and no. I don't hear it when watching TV, but I don't care for it when I'm sitting in a quiet room reading. In theory, a firmware update could correct that, so that when the unit is off and the hard drive has spun down, the fan shuts off. If the unit is not receiving updates to TVGOS, this should in theory be possible. However, hardware design could limit the possibilities.
In terms of power consumption, I never turn mine off. My reasoning is that, it is unlikely it is ever consuming more that 20W when I'm not using it. The reason I say this is, I have a Bell ExpressVu satellite receiver connected via S-Video, so TVGOS is never updating anything. I set the HDD to spin down after five minutes of inactivity, so it's unlikely once the HDD is not spinning that very much power is being consumed. It's certainly not consuming 34W at that point.
Fact is, in the greater scheme of things, this unit is not really consuming much power at all, even when on. Lights left on in unoccupied rooms, old and inefficient refrigerators & freezers, and various other appliances running in unoccupied rooms of your house consume a lot more energy than a DVR.