al74:
I don't like the pricing of both solutions but I agree with those preferring SD's tuner:
1. Live TV on any networked PC.
2. DRM limits are similar to Ceton as well so it's not really a con for SD.
3. And most important to me: more future proof? If CableCard won't die in the next 3 to four years the SD Tuner will let me keep my investments if I decide to replace my HTPC with a small mini-itx box that have no available pci slot. Actually, my PCI ATSC tuners are what stopping me from switching to a SFF HTPC as I will need to replace them with a USB tuner.
Your third point is a very important point. It makes upgrades/replacements a much easier task if things are discrete components. I'm not big on all-in-one solutions. For years I've kept my DSL modem, router, switch and Wifi access point standalone components for example, which allowed me to easily switch ISPs, install a faster switch and Wifi access point without having to buy a new router every time to keep pace with the latest technology improvements and reconfigure my firewall settings etc. Not to mention that the integrated switches are nowhere close in performance compared to standalone. Coincidentally, last night my main switch died. I was up and running again in 5 minutes by rotating in a spare switch and the wifey could continue watching TV. If the switch had been integrated in the router I would have had to get a new router and configure the router. Would have taken much longer than 5 minutes even if I had a spare router sitting around. Now I have plenty of time to call Netgear and get the defective switch replaced under its lifetime warranty.
I'm the same way about the tuners. My current DCTs are external. If one fails, I still have the second one and an HDHomeRun, so I probably can limp along until I get a replacement for the defective tuner.
Dell XPS 420, quad-core, 4GB RAM, 1TB
Dual ATI CableCARD tuners
HDHomeRun
Pioneer Elite PRO-1150HD connected via Linksys DMA2100
Pioneer PDP-5080HD connected via Linksys DMA2100
Velocity Micro Windows Home Server, 1TB
mControl Home Automation