That pittsburgh turn is a pain in the tuchus. I'd not go with sleeper for it, to be honest. By the time you are done eating dinner, and have a shower, its like 10, and if you like having a drink after dinner (I sure do), you are going to sleep about midnight. And with the midnight-going-to-sleep, the last time I did this, the train ran into PGH early- like 40 minutes early- so I must have gotten three hours sleep. If I had known this would be the case, I would have stayed up in the lounge car chatting with a girl I had been chatting with (she was getting off in Alliance, so she had even less reason to try to get some sleep), not bothered paying the money for the sleeper, and been happier in general.
The interesting stuff on the Pennsy isn't until later on the route, so a business class seat and sleep on that thing makes more sense then the sleeper.