Steinheil Ultra-series protectors are very nice. No orange peel effect, and the oleophobic one wipes clean very easily. Dry application and they aren't self-healing like a lot of the wet application ones are, but I haven't had a problem with them. You get two in a package, so when the first one on my DX got scratched up after 6-8 months, I put on the other one.
Also, it's not about the first 24 hours with the Zagg - over time, stuff tends to dig itself under the protector edges and lifts them up just enough for dust and lint to get underneath. Plus, I had horrible rainbow lines on the first one I applied. They blamed it on my install (which, frankly, went flawlessly) but nicely sent me another one. The second one, installed in the exact same way, had no rainbow effects. There are lots of complaints about that so I suspect it's a QC issue.
Frankly, all of those impressive strength demos don't really mean much. I mean, anything putting that much pressure on the screen is going to crack the glass. The only thing you really need to protect from is dirt and sand and metal from scratching the screen - and you don't need to be able to hold up a cinder block to do that.