I also live in Maryland and while I-95 is decent from MD to points north (aside from the usual backups and forcing use of the DC beltway and likely the Baltimore Beltway), it is horrible in Virginia and all points south.
Never have I experienced such horrid road engineering as I have on I-95/I-64 in VA...makes PA look like a paved paradise in comparison:grin::banghead:
I like I-81. It's cheaper, much more scenic and doesn't strike me as being much too small for the amount of traffic it carries.
But my complaints about I-95 in VA, a road that I travel WAY too much, aside, I'm also curious as to why you chose this particular route.