If you choose the east route, you can continue on Sligo Creek trail past Tacoma Park, to where it intersects the NW Branch trail near the West Hyattsville Metro. From there, it’s not a bad jog through NE DC to connect with the Met Branch trail.
I take a route like this — except i connect from the NW Branch into NE DC coming from the other direction. http://ridewithgps.com/routes/2176315
Scenic, pleasant, not crowded. On the other hand, it can get a little lonely on these routes late at night, which doesn’t bother me, but is worth noting — these routes are pretty well used in rush hour, but they aren’t bike highways by any means. -Jeff