well color me merpug!
ravi, i live in the DC metro area too......
i went to Dr. Thomas Wright in Annandale, VA and he works with the Inova Fairfax Hospital.
i was seeing him for at least 3 years and well, i lucked out and was able to avoid LIS but still had a colonoscopy under his care and it was perfect.
he is also on the top lists of CRS in the VA/MD/DC area and if you wanted just in case another opinion, look him up.
i love dr. wright.
fwiw, i have heard good things of paul savoca who is in your doc's office too. he is highly recommended as well but i personally haven't deal with him.