The DB-8e is an excellent choice, aimed at the Scranton towers (341 degrees on a compass). The Lehigh Valley stations at about 306 to 309 degrees are about 32 degrees off and would be picked up by the DB-8e's
Antenna Pattern. The extra gain could prove very useful in the attic location.
I have personally installed the Antennas Direct ClearStream2V, the DB-4e and the DB-8e (among others). All did well and are good products. Since the DB-8e is big it's likely going to need to be located in the center of your attic (near the peak of the roof) - unless you are luck to have a home with a huge attic. Before buying make sure that your attic can accommodate the large size (38"t x 50"w) when the flat front is aimed northeast, in a location where it does not "look" through anything metal.
The Winegard 7698 is also an excellent antenna but can be difficult to set up in an attic because of its size.
If you are supplying signal to one television I'd start without an amplifier.