I was in the same situation as you just a few weeks ago. I came to the conclusion that there is no current HDD that meets those criteria, as I was also looking for a 1-2TB drive that would work well in a DVR application.
The main limiting factor on disks suited for DVR installation is that heat and power ratings are more important than speed. Since a DVR will be reading and writing huge amounts of data at a relatively slow rate (~20Mbps), having a high-speed HDD isn't necessary, while having a cool-running one is. Most HDDs on the market are 7200+ RPM (because old HDD technology is trying to compete with the new SSD technology on speed), and a DVR runs cooler and more reliably with a 5400 RPM drive. That speed constraint alone severely limits the number of drives available for selection.
Among the slower HDD options, the Seagate Barracuda Green (1, 1.5, or 2TB @ 5900 RPM) and the Western Digital Caviar Green (1 or 2TB @ 5400 RPM) are the recommended choices, and Digital Connection
even offers to bundle one of them with the TViX, if you buy the unit there. The problem with these drives is that on sites like Newegg that have more than 100 reviews, nearly 20% of those reviews said that the drives were either dead on arrival (DoA) or would die within a few weeks. I don't know if this unreliability is related to the floods in Thailand, but considering how much HDD prices have risen lately, I considered those failure rates to be too high to take the risk of buying one of those drives. Another theory is that it seems like HDD manufacturers have tried to raise the capacity of drives faster than they've been able to perfect the technology for sustaining those capacities, so high-capacity drives have a higher likelihood of failing than drives with < 1TB of storage.
The other route you can go is to buy a laptop HDD, as most laptop drives are designed for low power and heat generation to save battery life, which makes them ideal for DVR usage. The problem with going this route is that the TViX drive bay is designed to hold a standard 3.5" drive, while laptop drives use the smaller 2.5" form factor. As a result, a laptop drive won't simply slide into the TViX; installing it requires you to put the unit on its side, slowly lower the HDD into the drive bay, align the connectors, and push it into place. Once it's locked, the 2.5" drive needs some kind of wedge or support system installed underneath it, or else it will dangle and eventually bend and damage the SATA connector inside the TViX over time, because there's about 0.5" of clearance between the laptop HDD and the bottom of the drive bay. There also don't seem to be any "official" adapters for this type of installation, as most 2.5" -> 3.5" HDD adapters are meant for computer cases and assume you're using SATA cables, rather than a plug-and-play configuration.
If this all sounds less than ideal, that's because it is.
HDDs are expensive right now, and the selection and quality seems fairly low, too. All I can tell you is that after considering the above, I opted to go the laptop HDD route. I figure it's not worthwhile to get the extra storage capacity of a 1-2TB drive if it's just going to die after I load it with 1.5 TB of content. As such, I opted to get a 500GB Hitachi Travelstar 5K500.B drive and klouge together a mounting system for it inside the TViX. If you look at earlier posts in this topic, I think you'll also find someone who inserted wooden wedges into his unit to keep a 2.5" HDD steady.
(You need something that will support it and also prevent it from working its way loose from vibration.) Although the laptop HDD solution isn't particularly elegant, it has the significant benefit of allowing for excellent air flow around the entire HDD, which you can't get with a full 3.5" drive. My TViX has been recording for the past 30 minutes as I write this, and the air coming out of the fan vent is still barely warm.
I hope this deluge of information is useful in some way, even if it isn't what you were hoping to hear.