I've commented enough on other posts and got a good night's sleep to make my own post about the Antares launch failure. +OrbitalSci
have good people and, with NASA's help, they'll be back in flight soon.
But, just as critics of the Orion SLS system have noted, is it necessary to make or use so many launch vehicles that often do the same job? For example, Expedition Flight Test 1 for the Orion spacecraft is going up with a Delta IV Heavy, a capable vehicle. Perhaps the Delta hasn't quite the chops for all applications. Would Orbital be better off in using other boosters? That said, having ULA and SpaceX and ESA ensures that there's a lifter alternative, somewhere.
In my opinion, using 48-year old refurbished engines is a bad idea. The N-1 moon rocket was a fatal blow to the USSR's effort in the space race, having never flown without a serious (and, once deadly to ground crew) failure. Some of us have criticized ULA for using similar engines, so I'm not picking on Orbital. In any case, glad only your pride and pocketbook were the only casualties and good wishes to getting back in business soon.